diff --git a/Demo/ARM7_LPC2106_GCC/Makefile b/Demo/ARM7_LPC2106_GCC/Makefile
index 1992dced4..0ea301cce 100644
--- a/Demo/ARM7_LPC2106_GCC/Makefile
+++ b/Demo/ARM7_LPC2106_GCC/Makefile
@@ -103,6 +103,7 @@ $(ARM_OBJ) : %.o : %.c $(LDSCRIPT) Makefile
 	$(CC) -c $(CFLAGS) $< -o $@
 
 clean :
+	rm -rf $(ARM_OBJ) $(THUMB_OBJ)
 	touch Makefile