diff --git a/src/finn/custom_op/fpgadataflow/fmpadding_batch.py b/src/finn/custom_op/fpgadataflow/fmpadding_batch.py
index c25975d0c3974a68a8e6ce0502d294406f76cd72..f9a9dc4340b18578550a9c453d90de86234d1cad 100644
--- a/src/finn/custom_op/fpgadataflow/fmpadding_batch.py
+++ b/src/finn/custom_op/fpgadataflow/fmpadding_batch.py
@@ -47,7 +47,7 @@ class FMPadding_Batch(HLSCustomOp):
         channels = self.get_nodeattr("NumChannels")
         simd = self.get_nodeattr("SIMD")
         batch_size = self.get_nodeattr("numInputVectors")
-        exp_cycles = channels / simd * batch_size * odim * odim
+        exp_cycles = (channels / simd) * batch_size * odim * odim
         return exp_cycles
 
     def get_normal_input_shape(self):