diff --git a/fw/common/Makefile.common b/fw/common/Makefile.common
index f7779f3..2466ab2 100644
--- a/fw/common/Makefile.common
+++ b/fw/common/Makefile.common
@@ -111,7 +111,7 @@ dfu.rel:	$(F32XBASE)/fw/boot/dfu.c
 # ----- clean -----------------------------------------------------------------
 
 
-clean:
+clean::
 		rm -f $(OBJS:%=%.rel)
 		rm -f $(OBJS:%=%.asm) $(OBJS:%=%.lst)
 		rm -f $(OBJS:%=%.rst) $(OBJS:%=%.sym)
@@ -121,5 +121,5 @@ clean:
 # ----- spotless --------------------------------------------------------------
 
 
-spotless:	clean
+spotless::	clean
 		rm -f $(MAIN).bin .depend