diff --git a/rtl/Makefile b/rtl/Makefile
index 39fc7ed..9a3f95b 100644
--- a/rtl/Makefile
+++ b/rtl/Makefile
@@ -26,7 +26,7 @@ all: ${FN}_filled.bin timing
 timing: ${FN}.rpt
 
 clean:
-	rm ${FN}.json ${FN}.asc ${FN}.bin ${FN}_filled.bin
+	rm -f ${FN}.json ${FN}.asc ${FN}.bin ${FN}_filled.bin ${FN}.rpt
 
 flash: ${FN}_filled.bin
 	flashrom -p ft2232_spi:type=232H,port=A -w "${FN}_filled.bin"