diff --git a/plugins/solokey/fu-solokey-firmware.c b/plugins/solokey/fu-solokey-firmware.c
index f9bf7dc54..d39e8584b 100644
--- a/plugins/solokey/fu-solokey-firmware.c
+++ b/plugins/solokey/fu-solokey-firmware.c
@@ -120,7 +120,6 @@ fu_solokey_firmware_write (FuFirmware *firmware, GError **error)
 {
 	g_autofree gchar *buf_base64 = NULL;
 	g_autoptr(FuFirmware) img = NULL;
-	g_autoptr(GByteArray) buf = g_byte_array_new ();
 	g_autoptr(GBytes) buf_blob = NULL;
 	g_autoptr(GString) str = g_string_new (NULL);
 	g_autoptr(JsonBuilder) builder = json_builder_new ();
diff --git a/plugins/thunderbolt/fu-thunderbolt-firmware.c b/plugins/thunderbolt/fu-thunderbolt-firmware.c
index 3b0818877..31d788924 100644
--- a/plugins/thunderbolt/fu-thunderbolt-firmware.c
+++ b/plugins/thunderbolt/fu-thunderbolt-firmware.c
@@ -133,7 +133,6 @@ fu_thunderbolt_firmware_export (FuFirmware *firmware,
 {
 	FuThunderboltFirmware *self = FU_THUNDERBOLT_FIRMWARE (firmware);
 	FuThunderboltFirmwarePrivate *priv = GET_PRIVATE (self);
-	g_autoptr(XbBuilderNode) bc = NULL;
 
 	fu_xmlb_builder_insert_kv (bn, "family",
 				   fu_thunderbolt_firmware_family_to_string (priv->family));
diff --git a/src/fu-engine.c b/src/fu-engine.c
index ad6ddf0d0..1f44fcd24 100644
--- a/src/fu-engine.c
+++ b/src/fu-engine.c
@@ -5663,7 +5663,6 @@ static gchar *
 fu_engine_attrs_calculate_hsi_for_chassis (FuEngine *self)
 {
 	guint val;
-	g_autoptr(GError) error = NULL;
 
 	/* get chassis type from SMBIOS data */
 	val = fu_context_get_smbios_integer (self->ctx,