1 files changed, 1 insertions, 0 deletions
diff --git a/src/alter.c b/src/alter.c
index 03605b25a..44422ca37 100644
--- a/src/alter.c
+++ b/src/alter.c
@@ -126,6 +126,7 @@ static void renameParentFunc(
         n = sqlite3GetToken(z, &token);
       }while( token==TK_SPACE );
 
+      if( token==TK_ILLEGAL ) break;
       zParent = sqlite3DbStrNDup(db, (const char *)z, n);
       if( zParent==0 ) break;
       sqlite3Dequote(zParent);