diff --git a/plugins/analogix/fu-analogix-device.h b/plugins/analogix/fu-analogix-device.h
index e94c6772c..584862497 100644
--- a/plugins/analogix/fu-analogix-device.h
+++ b/plugins/analogix/fu-analogix-device.h
@@ -9,7 +9,3 @@
 
 #define FU_TYPE_ANALOGIX_DEVICE (fu_analogix_device_get_type())
 G_DECLARE_FINAL_TYPE(FuAnalogixDevice, fu_analogix_device, FU, ANALOGIX_DEVICE, FuUsbDevice)
-
-struct _FuAnalogixDeviceClass {
-	FuUsbDeviceClass parent_class;
-};
diff --git a/plugins/corsair/fu-corsair-device.h b/plugins/corsair/fu-corsair-device.h
index b970d2a75..b76cb56bb 100644
--- a/plugins/corsair/fu-corsair-device.h
+++ b/plugins/corsair/fu-corsair-device.h
@@ -10,7 +10,3 @@
 
 #define FU_TYPE_CORSAIR_DEVICE (fu_corsair_device_get_type())
 G_DECLARE_FINAL_TYPE(FuCorsairDevice, fu_corsair_device, FU, CORSAIR_DEVICE, FuUsbDevice)
-
-struct _FuCorsairDeviceClass {
-	FuUsbDeviceClass parent_class;
-};
diff --git a/plugins/cros-ec/fu-cros-ec-usb-device.h b/plugins/cros-ec/fu-cros-ec-usb-device.h
index 7c68fc9a3..881748bfd 100644
--- a/plugins/cros-ec/fu-cros-ec-usb-device.h
+++ b/plugins/cros-ec/fu-cros-ec-usb-device.h
@@ -10,7 +10,3 @@
 
 #define FU_TYPE_CROS_EC_USB_DEVICE (fu_cros_ec_usb_device_get_type())
 G_DECLARE_FINAL_TYPE(FuCrosEcUsbDevice, fu_cros_ec_usb_device, FU, CROS_EC_USB_DEVICE, FuUsbDevice)
-
-struct _FuCrosEcUsbDeviceClass {
-	FuUsbDeviceClass parent_class;
-};
diff --git a/plugins/elanfp/fu-elanfp-device.h b/plugins/elanfp/fu-elanfp-device.h
index cf945053b..896e7e798 100644
--- a/plugins/elanfp/fu-elanfp-device.h
+++ b/plugins/elanfp/fu-elanfp-device.h
@@ -10,7 +10,3 @@
 
 #define FU_TYPE_ELANFP_DEVICE (fu_elanfp_device_get_type())
 G_DECLARE_FINAL_TYPE(FuElanfpDevice, fu_elanfp_device, FU, ELANFP_DEVICE, FuUsbDevice)
-
-struct _FuElanfpDeviceClass {
-	FuUsbDeviceClass parent_class;
-};
diff --git a/plugins/fresco-pd/fu-fresco-pd-device.h b/plugins/fresco-pd/fu-fresco-pd-device.h
index fd432f783..b0a7fffe0 100644
--- a/plugins/fresco-pd/fu-fresco-pd-device.h
+++ b/plugins/fresco-pd/fu-fresco-pd-device.h
@@ -10,7 +10,3 @@
 
 #define FU_TYPE_FRESCO_PD_DEVICE (fu_fresco_pd_device_get_type())
 G_DECLARE_FINAL_TYPE(FuFrescoPdDevice, fu_fresco_pd_device, FU, FRESCO_PD_DEVICE, FuUsbDevice)
-
-struct _FuFrescoPdDeviceClass {
-	FuUsbDeviceClass parent_class;
-};
diff --git a/plugins/steelseries/fu-steelseries-fizz.h b/plugins/steelseries/fu-steelseries-fizz.h
index cc7e7a8a6..f5666d537 100644
--- a/plugins/steelseries/fu-steelseries-fizz.h
+++ b/plugins/steelseries/fu-steelseries-fizz.h
@@ -10,7 +10,3 @@
 
 #define FU_TYPE_STEELSERIES_FIZZ (fu_steelseries_fizz_get_type())
 G_DECLARE_FINAL_TYPE(FuSteelseriesFizz, fu_steelseries_fizz, FU, STEELSERIES_FIZZ, FuUsbDevice)
-
-struct _FuSteelseriesFizzClass {
-	FuUsbDeviceClass parent_class;
-};
diff --git a/plugins/steelseries/fu-steelseries-gamepad.h b/plugins/steelseries/fu-steelseries-gamepad.h
index 38d50ef03..2f9008386 100644
--- a/plugins/steelseries/fu-steelseries-gamepad.h
+++ b/plugins/steelseries/fu-steelseries-gamepad.h
@@ -14,7 +14,3 @@ G_DECLARE_FINAL_TYPE(FuSteelseriesGamepad,
 		     FU,
 		     STEELSERIES_GAMEPAD,
 		     FuUsbDevice)
-
-struct _FuSteelseriesGamepadClass {
-	FuUsbDeviceClass parent_class;
-};
diff --git a/plugins/steelseries/fu-steelseries-sonic.h b/plugins/steelseries/fu-steelseries-sonic.h
index 802fa4df1..4d3352259 100644
--- a/plugins/steelseries/fu-steelseries-sonic.h
+++ b/plugins/steelseries/fu-steelseries-sonic.h
@@ -10,7 +10,3 @@
 
 #define FU_TYPE_STEELSERIES_SONIC (fu_steelseries_sonic_get_type())
 G_DECLARE_FINAL_TYPE(FuSteelseriesSonic, fu_steelseries_sonic, FU, STEELSERIES_SONIC, FuUsbDevice)
-
-struct _FuSteelseriesSonicClass {
-	FuUsbDeviceClass parent_class;
-};
diff --git a/plugins/synaptics-cape/fu-synaptics-cape-device.h b/plugins/synaptics-cape/fu-synaptics-cape-device.h
index ca7d9becc..a232dd259 100644
--- a/plugins/synaptics-cape/fu-synaptics-cape-device.h
+++ b/plugins/synaptics-cape/fu-synaptics-cape-device.h
@@ -14,7 +14,3 @@ G_DECLARE_FINAL_TYPE(FuSynapticsCapeDevice,
 		     FU,
 		     SYNAPTICS_CAPE_DEVICE,
 		     FuHidDevice)
-
-struct _FuSynapticsCapeDeviceClass {
-	FuHidDeviceClass parent_class;
-};
diff --git a/plugins/synaptics-cxaudio/fu-synaptics-cxaudio-device.h b/plugins/synaptics-cxaudio/fu-synaptics-cxaudio-device.h
index ec4245304..47aa318ef 100644
--- a/plugins/synaptics-cxaudio/fu-synaptics-cxaudio-device.h
+++ b/plugins/synaptics-cxaudio/fu-synaptics-cxaudio-device.h
@@ -14,7 +14,3 @@ G_DECLARE_FINAL_TYPE(FuSynapticsCxaudioDevice,
 		     FU,
 		     SYNAPTICS_CXAUDIO_DEVICE,
 		     FuHidDevice)
-
-struct _FuSynapticsCxaudioDeviceClass {
-	FuHidDeviceClass parent_class;
-};
diff --git a/plugins/uefi-capsule/fu-uefi-cod-device.h b/plugins/uefi-capsule/fu-uefi-cod-device.h
index 433a1515b..43ab2c862 100644
--- a/plugins/uefi-capsule/fu-uefi-cod-device.h
+++ b/plugins/uefi-capsule/fu-uefi-cod-device.h
@@ -12,7 +12,3 @@
 
 #define FU_TYPE_UEFI_COD_DEVICE (fu_uefi_cod_device_get_type())
 G_DECLARE_FINAL_TYPE(FuUefiCodDevice, fu_uefi_cod_device, FU, UEFI_COD_DEVICE, FuUefiDevice)
-
-struct _FuUefiCodDeviceClass {
-	FuUefiDeviceClass parent_class;
-};
diff --git a/plugins/uefi-capsule/fu-uefi-grub-device.h b/plugins/uefi-capsule/fu-uefi-grub-device.h
index 34e11d7e8..0e28c4b1a 100644
--- a/plugins/uefi-capsule/fu-uefi-grub-device.h
+++ b/plugins/uefi-capsule/fu-uefi-grub-device.h
@@ -12,7 +12,3 @@
 
 #define FU_TYPE_UEFI_GRUB_DEVICE (fu_uefi_grub_device_get_type())
 G_DECLARE_FINAL_TYPE(FuUefiGrubDevice, fu_uefi_grub_device, FU, UEFI_GRUB_DEVICE, FuUefiDevice)
-
-struct _FuUefiGrubDeviceClass {
-	FuUefiDeviceClass parent_class;
-};
diff --git a/plugins/uefi-capsule/fu-uefi-nvram-device.h b/plugins/uefi-capsule/fu-uefi-nvram-device.h
index 91642c0be..f022f43f8 100644
--- a/plugins/uefi-capsule/fu-uefi-nvram-device.h
+++ b/plugins/uefi-capsule/fu-uefi-nvram-device.h
@@ -12,7 +12,3 @@
 
 #define FU_TYPE_UEFI_NVRAM_DEVICE (fu_uefi_nvram_device_get_type())
 G_DECLARE_FINAL_TYPE(FuUefiNvramDevice, fu_uefi_nvram_device, FU, UEFI_NVRAM_DEVICE, FuUefiDevice)
-
-struct _FuUefiNvramDeviceClass {
-	FuUefiDeviceClass parent_class;
-};
diff --git a/plugins/vli/fu-vli-pd-device.h b/plugins/vli/fu-vli-pd-device.h
index 74aad7c57..3f63aa0c7 100644
--- a/plugins/vli/fu-vli-pd-device.h
+++ b/plugins/vli/fu-vli-pd-device.h
@@ -12,7 +12,3 @@
 
 #define FU_TYPE_VLI_PD_DEVICE (fu_vli_pd_device_get_type())
 G_DECLARE_FINAL_TYPE(FuVliPdDevice, fu_vli_pd_device, FU, VLI_PD_DEVICE, FuVliDevice)
-
-struct _FuVliPdDeviceClass {
-	FuVliDeviceClass parent_class;
-};
diff --git a/plugins/vli/fu-vli-pd-parade-device.h b/plugins/vli/fu-vli-pd-parade-device.h
index 4691db4df..98508e9ec 100644
--- a/plugins/vli/fu-vli-pd-parade-device.h
+++ b/plugins/vli/fu-vli-pd-parade-device.h
@@ -17,9 +17,5 @@ G_DECLARE_FINAL_TYPE(FuVliPdParadeDevice,
 		     VLI_PD_PARADE_DEVICE,
 		     FuDevice)
 
-struct _FuVliPdParadeDeviceClass {
-	FuDeviceClass parent_class;
-};
-
 FuDevice *
 fu_vli_pd_parade_device_new(FuVliDevice *parent);
diff --git a/plugins/vli/fu-vli-usbhub-device.h b/plugins/vli/fu-vli-usbhub-device.h
index ad8e28e08..5518d30f9 100644
--- a/plugins/vli/fu-vli-usbhub-device.h
+++ b/plugins/vli/fu-vli-usbhub-device.h
@@ -12,7 +12,3 @@
 
 #define FU_TYPE_VLI_USBHUB_DEVICE (fu_vli_usbhub_device_get_type())
 G_DECLARE_FINAL_TYPE(FuVliUsbhubDevice, fu_vli_usbhub_device, FU, VLI_USBHUB_DEVICE, FuVliDevice)
-
-struct _FuVliUsbhubDeviceClass {
-	FuVliDeviceClass parent_class;
-};
diff --git a/plugins/vli/fu-vli-usbhub-msp430-device.h b/plugins/vli/fu-vli-usbhub-msp430-device.h
index 9c27a9d15..10bb93ee4 100644
--- a/plugins/vli/fu-vli-usbhub-msp430-device.h
+++ b/plugins/vli/fu-vli-usbhub-msp430-device.h
@@ -15,9 +15,5 @@ G_DECLARE_FINAL_TYPE(FuVliUsbhubMsp430Device,
 		     VLI_USBHUB_MSP430_DEVICE,
 		     FuDevice)
 
-struct _FuVliUsbhubMsp430DeviceClass {
-	FuDeviceClass parent_class;
-};
-
 FuDevice *
 fu_vli_usbhub_msp430_device_new(FuVliUsbhubDevice *parent);
diff --git a/plugins/vli/fu-vli-usbhub-pd-device.h b/plugins/vli/fu-vli-usbhub-pd-device.h
index fee8a4d40..37bfd0193 100644
--- a/plugins/vli/fu-vli-usbhub-pd-device.h
+++ b/plugins/vli/fu-vli-usbhub-pd-device.h
@@ -15,9 +15,5 @@ G_DECLARE_FINAL_TYPE(FuVliUsbhubPdDevice,
 		     VLI_USBHUB_PD_DEVICE,
 		     FuDevice)
 
-struct _FuVliUsbhubPdDeviceClass {
-	FuDeviceClass parent_class;
-};
-
 FuDevice *
 fu_vli_usbhub_pd_device_new(FuVliUsbhubDevice *parent);
diff --git a/plugins/vli/fu-vli-usbhub-rtd21xx-device.h b/plugins/vli/fu-vli-usbhub-rtd21xx-device.h
index b0defe6fd..4f87694e3 100644
--- a/plugins/vli/fu-vli-usbhub-rtd21xx-device.h
+++ b/plugins/vli/fu-vli-usbhub-rtd21xx-device.h
@@ -15,9 +15,5 @@ G_DECLARE_FINAL_TYPE(FuVliUsbhubRtd21xxDevice,
 		     VLI_USBHUB_RTD21XX_DEVICE,
 		     FuDevice)
 
-struct _FuVliUsbhubRtd21xxDeviceClass {
-	FuDeviceClass parent_class;
-};
-
 FuDevice *
 fu_vli_usbhub_rtd21xx_device_new(FuVliUsbhubDevice *parent);