diff --git a/MiscMerge/MiscMergeEngine.m b/MiscMerge/MiscMergeEngine.m
index 224c5410..66f02cb9 100755
--- a/MiscMerge/MiscMergeEngine.m
+++ b/MiscMerge/MiscMergeEngine.m
@@ -466,7 +466,7 @@ - (MiscMergeTemplate *)template
 "*/
 - (void)setMainObject:(id)anObject
 {
-    unsigned oldIndex = NSNotFound;
+    NSUInteger oldIndex = NSNotFound;
 
     if (currentObject != nil)
     {