diff --git a/apps/mksh/Makefile b/apps/mksh/Makefile
index a468a0466601bbf75da1b8cd47ba85b1e0cde59e..c6180344a1cde2776af4b03c8a49df5c3de313df 100755
--- a/apps/mksh/Makefile
+++ b/apps/mksh/Makefile
@@ -46,7 +46,7 @@ LOCAL_CFLAGS += -DMKSH_LESS_CMDLINE_EDITING -DMKSH_LESS_BUILDINS -DMKSH_NO_INITC
 all:$(MKSH)
 
 $(MKSH):
-ifneq ($(wildcard $(BUILD_DIR)),)
+ifneq ($(wildcard $(BUILD_DIR)/Rebuild.sh),)
 	$(HIDE)echo "not clean, rebuilding now"
 	$(HIDE)chmod +x $(BUILD_DIR)/Rebuild.sh
 	$(HIDE)cd $(BUILD_DIR) && ./Rebuild.sh > $(BUILD_LOG) 2>&1