diff --git a/Makefile b/Makefile
index 4fb5a66..de2b9b0 100644
--- a/Makefile
+++ b/Makefile
@@ -31,7 +31,7 @@ ASM_FILES := $(patsubst $(BUILD_DIR)/%.i,$(BUILD_DIR)/%.S,$(PREP_FILES))
 OBJ_FILES := $(patsubst $(BUILD_DIR)/%.S,$(BUILD_DIR)/%.o,$(ASM_FILES))
 
 .PHONY: build
-build: builddir preprocess compile assemble $(BUILD_DIR)/$(TARGET).elf
+build: clean builddir preprocess compile assemble $(BUILD_DIR)/$(TARGET).elf
 
 $(BUILD_DIR)/$(TARGET).bin: $(BUILD_DIR)/$(TARGET).elf
 	arm-none-eabi-objcopy -O binary $< $@