diff --git a/Makefile b/Makefile
index ed94974..6007a46 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ VERSION := $(MAJOR).$(MINOR).$(PATCH)
 PREFIX ?= /usr/local
 BUILD_DIR := build
 RELEASE_OPTIMIZE_FLAGS ?= -O3
-DEBUG_OPTIMIZE_FLAGS ?= -g -O0
+DEBUG_OPTIMIZE_FLAGS ?= -g -O0 -U_FORTIFY_SOURCE
 JS_OPTIMIZE_FLAGS ?= -O3
 FUZZER_OPTIMIZE_FLAGS ?= -O3
 CC = gcc