diff --git a/nodes.py b/nodes.py
index 0cc3712..1c667cd 100644
--- a/nodes.py
+++ b/nodes.py
@@ -1402,7 +1402,7 @@ class ImageConcanate:
             {
             "default": 'right'
              }),
-            "match_image_size": ("BOOLEAN", {"default": True}),
+            "match_image_size": ("BOOLEAN", {"default": False}),
         }}
 
     RETURN_TYPES = ("IMAGE",)