diff --git a/src/finn/custom_op/fpgadataflow/fmpadding.py b/src/finn/custom_op/fpgadataflow/fmpadding.py
index 5b5ec79c1b6a136f6c2518a320fb83e218349280..675bbfee67d99dfa8ee288e717d52ea5dad9e397 100644
--- a/src/finn/custom_op/fpgadataflow/fmpadding.py
+++ b/src/finn/custom_op/fpgadataflow/fmpadding.py
@@ -17,7 +17,7 @@ class FMPadding_Batch(HLSCustomOp):
         my_attrs = {
             "ImgDim": ("i", True, 0),
             "OutputDim": ("i", True, 0),
-            "Padding": ("i", True, 4),
+            "Padding": ("i", True, 2),
             "NumChannels": ("i", True, 0),
             # FINN input datatype
             "inputDataType": ("s", True, ""),