diff --git a/plugins/wacom-usb/fu-wac-module-touch.c b/plugins/wacom-usb/fu-wac-module-touch.c
index 959bbf1bb..c39a7f9cc 100644
--- a/plugins/wacom-usb/fu-wac-module-touch.c
+++ b/plugins/wacom-usb/fu-wac-module-touch.c
@@ -82,7 +82,15 @@ fu_wac_module_touch_write_firmware(FuDevice *device,
 		buf[1] = fu_chunk_get_idx(chk) + 1;
 		fu_common_write_uint32(&buf[2], fu_chunk_get_address(chk), G_LITTLE_ENDIAN);
 		buf[6] = 0x10; /* no idea! */
-		memcpy(&buf[7], fu_chunk_get_data(chk), fu_chunk_get_data_sz(chk));
+		if (!fu_memcpy_safe(buf,
+				    sizeof(buf),
+				    0x07, /* dst */
+				    fu_chunk_get_data(chk),
+				    fu_chunk_get_data_sz(chk),
+				    0x0, /* src */
+				    fu_chunk_get_data_sz(chk),
+				    error))
+			return FALSE;
 		blob_chunk = g_bytes_new(buf, sizeof(buf));
 		if (!fu_wac_module_set_feature(self,
 					       FU_WAC_MODULE_COMMAND_DATA,