diff --git a/src/core/core_cmd.c b/src/core/core_cmd.c
index 717e240fdec..6a32b2f932a 100644
--- a/src/core/core_cmd.c
+++ b/src/core/core_cmd.c
@@ -224,7 +224,7 @@ static const char* dst_blst_stats_get_doc[] = {
 #endif
 
 
-#define MAX_CTIME_LEN 25
+#define MAX_CTIME_LEN 26
 
 /* up time */
 static char up_since_ctime[MAX_CTIME_LEN];
diff --git a/src/core/select_core.c b/src/core/select_core.c
index 6190c8b8758..029f880a482 100644
--- a/src/core/select_core.c
+++ b/src/core/select_core.c
@@ -1565,7 +1565,7 @@ int select_sys_now_fmt(str* res, select_t* s, struct sip_msg* msg)
 			return -1;
 	}
 	if (s->n <= SEL_POS+1) {
-		char buff[25];
+		char buff[26];
 		if (! asctime_r(&tm, buff)) {
 			ERR("Invalid time value\n");
 			return -1;