diff --git a/Source/NSComboBoxCell.m b/Source/NSComboBoxCell.m
index f08a39933..be3e32e27 100644
--- a/Source/NSComboBoxCell.m
+++ b/Source/NSComboBoxCell.m
@@ -768,7 +768,7 @@ numberOfRowsInColumn: (int)column
     }
   else
   {
-    int i;
+    unsigned int i;
 
     for (i = 0; i < [_popUpList count]; i++)
       {