diff --git a/Makefile b/Makefile
index 807e47e..460481b 100644
--- a/Makefile
+++ b/Makefile
@@ -37,10 +37,10 @@ LIBC_OBJ := $(addprefix $(BUILD_DIR)/,$(LIBC_C_FILES:.c=.o))
 BUILD_ID := $(shell tools/generate_build_id.py --arch $(ARCH))
 
 CFLAGS := $(CFLAGS) -DBUILD_ID=\"$(BUILD_ID)\" -g -Wall -Werror -pedantic \
-	-Iinclude -Iarch/$(ARCH)/include -Ilibc/include
+	-Iinclude -Iarch/$(ARCH)/include -Ilibc/include -Os
 
 ASMFLAGS := $(ASMFLAGS) -DBUILD_ID=\"$(BUILD_ID)\"
-LDFLAGS := $(LDFLAGS) -g
+LDFLAGS := $(LDFLAGS) -g -Os
 
 ALL_KERNEL_OBJECT_FILES := $(KERNEL_OBJ) $(ARCH_OBJ) $(LIBC_OBJ)
 ALL_KERNEL_DEPS := $(ALL_KERNEL_OBJECT_FILES:.o=.d)