diff --git a/defs.mk b/defs.mk
index 0a9f13f..c55334d 100644
--- a/defs.mk
+++ b/defs.mk
@@ -50,7 +50,7 @@ dep:
 -include .depend
 
 clean:
-	$(RM) $(objs) $(libs) $(progs)
+	$(RM) $(objs) $(libs) $(bins) $(extra_clean)
 	$(RM) .build_profile
 	$(RM) *.o *.a *.so *~
 
diff --git a/ibsim/Makefile b/ibsim/Makefile
index 73f92e9..7ab7939 100644
--- a/ibsim/Makefile
+++ b/ibsim/Makefile
@@ -1,6 +1,7 @@
 bins:=ibsim
 scripts:=ibsim-run
-progs:=$(bins) $(scrips)
+progs:=$(bins) $(scripts)
+extra_clean:=ibsim-run
 
 -include ../defs.mk