diff --git a/UIImage+Resize.m b/UIImage+Resize.m
index af9c4e8..085a46b 100755
--- a/UIImage+Resize.m
+++ b/UIImage+Resize.m
@@ -86,7 +86,7 @@ - (UIImage *)resizedImageWithContentMode:(UIViewContentMode)contentMode
             break;
             
         default:
-            [NSException raise:NSInvalidArgumentException format:@"Unsupported content mode: %d", contentMode];
+            [NSException raise:NSInvalidArgumentException format:@"Unsupported content mode: %ld", (long)contentMode];
     }
     
     CGSize newSize = CGSizeMake(self.size.width * ratio, self.size.height * ratio);