1 files changed, 2 insertions, 1 deletions

diff --git a/src/prog.mk b/src/prog.mk
index 4f9309d8c..3e89a6ba8 100644
--- a/src/prog.mk
+++ b/src/prog.mk
@@ -6,6 +6,7 @@
 # define EXTRA_OBJS and extend CLEANFILES.
 
 CC ?= cc
+RM ?= rm -f
 
 HDRS :=
 SRCS := $(sort $(wildcard $(MOD_DIR)/*.c))
@@ -27,4 +28,4 @@ $(PROG): $(OBJS) $(EXTRA_OBJS) $(ROOT)/config.mk
         $(CC) $(PROG_LDFLAGS) $(LDFLAGS) -o $@ $(OBJS) $(EXTRA_OBJS) $(LIBS)
 
 .PHONY: clean
-clean:; rm -fr $(PROG) $(CLEANFILES)
+clean:; $(RM) -r $(PROG) $(CLEANFILES)