diff --git a/source/compiler/sc1.c b/source/compiler/sc1.c
index b4bb676..7dc3cf6 100644
--- a/source/compiler/sc1.c
+++ b/source/compiler/sc1.c
@@ -4737,7 +4737,7 @@ static constvalue *insert_constval(constvalue *prev,constvalue *next,const char
     error(103);       /* insufficient memory (fatal error) */
   memset(cur,0,sizeof(constvalue));
   if (name!=NULL) {
-    assert(strlen(name)<sNAMEMAX);
+    assert(strlen(name)<sNAMEMAX+1);
     strcpy(cur->name,name);
   } /* if */
   cur->value=val;