diff --git a/Makefile b/Makefile
index 3e7e62a..46bf06c 100644
--- a/Makefile
+++ b/Makefile
@@ -30,9 +30,7 @@ LDFLAGS += -m elf64lriscv
 CFLAGS += -mcmodel=medany
 CFLAGS += -march=rv64gc -mabi=lp64
 
-CFLAGS += -Wall -Werror -O
-CFLAGS += -Wno-unused-result
-CFLAGS += -Wno-unused-variable
+CFLAGS += -Wall -Wextra
 CFLAGS += -ffreestanding
 CFLAGS += -fno-common
 CFLAGS += -nostdlib