diff --git a/sys/modules/usb/i2ctinyusb/Makefile b/sys/modules/usb/i2ctinyusb/Makefile
index 9cb37843935c..340e7d56ca43 100644
--- a/sys/modules/usb/i2ctinyusb/Makefile
+++ b/sys/modules/usb/i2ctinyusb/Makefile
@@ -29,7 +29,6 @@ S=     ${SRCTOP}/sys
 .PATH: $S/dev/usb/misc
 
 KMOD=	i2ctinyusb
-SRCS=	i2ctinyusb.c
-SRCS+=	i2ctinyusb.c device_if.h bus_if.h opt_usb.h usbdevs.h iicbus_if.h
+SRCS=	i2ctinyusb.c device_if.h bus_if.h opt_usb.h usbdevs.h iicbus_if.h
 
 .include <bsd.kmod.mk>