diff --git a/src/lib/common/nat.c b/src/lib/common/nat.c
index 11f565b4..d83df636 100644
--- a/src/lib/common/nat.c
+++ b/src/lib/common/nat.c
@@ -64,7 +64,7 @@ relatename(struct natstr *np, natid other)
 char *
 rejectname(struct natstr *np, natid other)
 {
-    char *rejects[] = {
+    static char *rejects[] = {
 	/* must follow reject flags defined in nat.h */
 	"  YES  YES  YES  YES",
 	"  NO   YES  YES  YES",