diff --git a/srcpkgs/glibc/template b/srcpkgs/glibc/template
index 68523cfc77..3be72ebe5f 100644
--- a/srcpkgs/glibc/template
+++ b/srcpkgs/glibc/template
@@ -72,7 +72,7 @@ do_configure() {
 	# Disable SSP
 	export CFLAGS="${CFLAGS/-fstack-protector-strong/}"
 	# Disable FORTIFY_SOURCE
-	export CPPFLAGS="${CPPFLAGS/-D_FORTIFY_SOURCE=?/}"
+	export CFLAGS="${CFLAGS/-D_FORTIFY_SOURCE=?/}"
 
 	SHELL=/bin/bash ../configure ${configure_args} \
 		--bindir=/usr/bin --sbindir=/usr/sbin \