diff --git a/src/finn/custom_op/fpgadataflow/fmpadding_rtl.py b/src/finn/custom_op/fpgadataflow/fmpadding_rtl.py
index df6f40ab6f5be6bce79f22d320f12b4625db1efe..d0302540bd55a427bfe8ab56de7adc8c9d37cb5f 100644
--- a/src/finn/custom_op/fpgadataflow/fmpadding_rtl.py
+++ b/src/finn/custom_op/fpgadataflow/fmpadding_rtl.py
@@ -101,20 +101,20 @@ class FMPadding_rtl(HLSCustomOp):
         exp_cycles = (channels / simd) * batch_size * odim_h * odim_w
         return int(exp_cycles)
 
-    def get_normal_input_shape(self):
+    def get_normal_input_shape(self, ind=0):
         idim_h, idim_w = self.get_nodeattr("ImgDim")
         num_ch = self.get_nodeattr("NumChannels")
         ishape = (1, idim_h, idim_w, num_ch)
         return ishape
 
-    def get_normal_output_shape(self):
+    def get_normal_output_shape(self, ind=0):
         odim_h, odim_w = self.get_padded_odim()
         num_ch = self.get_nodeattr("NumChannels")
 
         oshape = (1, odim_h, odim_w, num_ch)
         return oshape
 
-    def get_folded_input_shape(self):
+    def get_folded_input_shape(self, ind=0):
         normal_ishape = list(self.get_normal_input_shape())
         ifm_ch = self.get_nodeattr("NumChannels")
         simd = self.get_nodeattr("SIMD")
@@ -123,7 +123,7 @@ class FMPadding_rtl(HLSCustomOp):
         folded_ishape = normal_ishape[:-1] + [fold, simd]
         return tuple(folded_ishape)
 
-    def get_folded_output_shape(self):
+    def get_folded_output_shape(self, ind=0):
         normal_oshape = list(self.get_normal_output_shape())
         ifm_ch = self.get_nodeattr("NumChannels")
         simd = self.get_nodeattr("SIMD")
@@ -155,7 +155,7 @@ class FMPadding_rtl(HLSCustomOp):
     def verify_node(self):
         pass
 
-    def get_input_datatype(self):
+    def get_input_datatype(self, ind=0):
         """Returns FINN DataType of input."""
         ret = DataType[self.get_nodeattr("inputDataType")]
         # the hlslib op always pads with zeros, so ensure that the DataType
@@ -163,16 +163,16 @@ class FMPadding_rtl(HLSCustomOp):
         assert ret.allowed(0), "FMPadding_Batch DataType must support zero"
         return ret
 
-    def get_output_datatype(self):
+    def get_output_datatype(self, ind=0):
         """Returns FINN DataType of output. (Same as input datatype)"""
         return self.get_input_datatype()
 
-    def get_instream_width(self):
+    def get_instream_width(self, ind=0):
         ibits = self.get_input_datatype().bitwidth()
         simd = self.get_nodeattr("SIMD")
         return ibits * simd
 
-    def get_outstream_width(self):
+    def get_outstream_width(self, ind=0):
         obits = self.get_output_datatype().bitwidth()
         simd = self.get_nodeattr("SIMD")
         return obits * simd