diff --git a/core/combo/TARGET_linux-arm.mk b/core/combo/TARGET_linux-arm.mk
index ca14651d01..deceea3d86 100644
--- a/core/combo/TARGET_linux-arm.mk
+++ b/core/combo/TARGET_linux-arm.mk
@@ -105,7 +105,7 @@ TARGET_GLOBAL_CFLAGS += \
 			-fstack-protector \
 			-Wa,--noexecstack \
 			-Werror=format-security \
-			-D_FORTIFY_SOURCE=1 \
+			-D_FORTIFY_SOURCE=2 \
 			-fno-short-enums \
 			$(arch_variant_cflags)