diff --git a/sys/modules/fdt/fdt_slicer/Makefile b/sys/modules/fdt/fdt_slicer/Makefile
index 0338fd6f1261..5a38cd1f71ec 100644
--- a/sys/modules/fdt/fdt_slicer/Makefile
+++ b/sys/modules/fdt/fdt_slicer/Makefile
@@ -7,6 +7,7 @@ SRCS=	fdt_slicer.c
 
 # Generated files...
 SRCS+=	\
+	bus_if.h \
 	device_if.h \
 	ofw_bus_if.h \
 	opt_platform.h \