diff --git a/src/cfgparse-listen.c b/src/cfgparse-listen.c
index 6678e15..588ff97 100644
--- a/src/cfgparse-listen.c
+++ b/src/cfgparse-listen.c
@@ -1510,6 +1510,10 @@
 		}
 		rule->cond = cond;
 		rule->be.name = strdup(args[1]);
+		if (!rule->be.name) {
+			ha_alert("Out of memory error.\n");
+			goto out;
+		}
 		rule->line = linenum;
 		rule->file = strdup(file);
 		if (!rule->file) {