diff --git a/Makefile b/Makefile
index 16f367d..e6fffc2 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,7 @@ CFLAGS:=-DVERSION=\"v$(VERSION)\ \($(COMMIT)\)\" \
 	-DSOCKET_PATH=\"$(SOCKET_PATH)\" \
 	-DCONFIG_DIR=\"$(CONFIG_DIR)\" \
 	-DDATA_DIR=\"$(PREFIX)/share/keyd\" \
+	-D_FORTIFY_SOURCE=2\
 	-D_DEFAULT_SOURCE \
 	$(CFLAGS)