diff --git a/Makefile b/Makefile
index 07c8652..c4fe63c 100644
--- a/Makefile
+++ b/Makefile
@@ -78,7 +78,7 @@
 
 OBJFILES := $(patsubst %.c,$(TARGET_OUT)/%.o,$(LOCAL_SRC_FILES))
 
-toolbox: $(OBJFILES)
+toolbox: $(TOOLS_H) $(OBJFILES)
 	$(CC) -o $(TARGET_OUT)/$(TARGET) $(OBJFILES) $(LIBRARIES)
 
 # Make #!/system/bin/toolbox launchers for each tool.