diff --git a/Hashids/Classes/Hashids.m b/Hashids/Classes/Hashids.m
index 8cd1cde..a9d77a5 100644
--- a/Hashids/Classes/Hashids.m
+++ b/Hashids/Classes/Hashids.m
@@ -314,7 +314,7 @@ - (NSString *) encodeValues:(NSArray *)values
         if(excess > 0){
             int start_pos = excess / 2;
             
-            ret_str = [[ret_str substringWithRange:NSMakeRange(start_pos, start_pos + minHashLength)] mutableCopy];
+            ret_str = [[ret_str substringWithRange:NSMakeRange(start_pos,  minHashLength)] mutableCopy];
         }
     }