diff --git a/output/outobj.c b/output/outobj.c
index 0d4d3110..f5ab7a24 100644
--- a/output/outobj.c
+++ b/output/outobj.c
@@ -424,6 +424,12 @@ static ObjRecord *obj_name(ObjRecord * orp, const char *name)
     int len = strlen(name);
     uint8_t *ptr;
 
+    if (len > UINT8_MAX) {
+        nasm_warn(WARN_OTHER, "cutting object name '%128s...' to %u bytes",
+                  name, UINT8_MAX);
+        len = UINT8_MAX;
+    }
+
     orp = obj_check(orp, len + 1);
     ptr = orp->buf + orp->used;
     *ptr++ = len;