diff --git a/main/pbx.c b/main/pbx.c
index b10ff51..bcce39d 100644
--- a/main/pbx.c
+++ b/main/pbx.c
@@ -2230,7 +2230,7 @@ static struct match_char *add_exten_to_pattern_tree(struct ast_context *con, str
 					return m2;
 				}
 				if (m2->exten) {
-					ast_log(LOG_WARNING, "Found duplicate exten. Had %s found %s\n",
+					ast_log(LOG_WARNING, "Found duplicate exten. Had %.32s found %.32s\n",
 						m2->deleted ? "(deleted/invalid)" : m2->exten->exten, e1->exten);
 				}
 				m2->exten = e1;
@@ -2256,7 +2256,7 @@ static struct match_char *add_exten_to_pattern_tree(struct ast_context *con, str
 			}
 			if (!pat_node[idx_next].buf[0]) {
 				if (m2 && m2->exten) {
-					ast_log(LOG_WARNING, "Found duplicate exten. Had %s found %s\n",
+					ast_log(LOG_WARNING, "Found duplicate exten. Had %.32s found %.32s\n",
 						m2->deleted ? "(deleted/invalid)" : m2->exten->exten, e1->exten);
 				}
 				m1->deleted = 0;