diff --git a/Makefile b/Makefile
index 9cfe65be..3bb64f98 100644
--- a/Makefile
+++ b/Makefile
@@ -125,7 +125,7 @@ endif
 # Provide default CC and CFLAGS for firmware builds; if you have any -D flags,
 # please add them after this point (e.g., -DVBOOT_DEBUG).
 DEBUG_FLAGS := $(if $(filter-out 0,${DEBUG}),-g -Og,-g -Os)
-WERROR := -Werror
+WERROR :=
 FIRMWARE_FLAGS := -nostdinc -ffreestanding -fno-builtin -fno-stack-protector
 COMMON_FLAGS := -pipe ${WERROR} -Wall -Wstrict-prototypes -Wtype-limits \
 	-Wundef -Wmissing-prototypes -Wno-trigraphs -Wredundant-decls -Wshadow \