diff --git a/src/finn/custom_op/fpgadataflow/pool_batch.py b/src/finn/custom_op/fpgadataflow/pool_batch.py
index 3b0f3fbf00072659b9f43047aab3a26f7abf8f3a..4a2fa6889ae0ebb94976d50b0fc8362d01a63bea 100644
--- a/src/finn/custom_op/fpgadataflow/pool_batch.py
+++ b/src/finn/custom_op/fpgadataflow/pool_batch.py
@@ -143,7 +143,7 @@ class Pool_Batch(HLSCustomOp):
         k = self.get_nodeattr("KernelSize")
         odim = self.get_nodeattr("OutImgDim")
         batch_size = self.get_nodeattr("BatchSize")
-        exp_cycles = (ifm_ch * k * k) / pe * odim * odim * batch_size
+        exp_cycles = ((ifm_ch * k * k) / pe) * odim * odim * batch_size
         return int(exp_cycles)
 
     def get_instream_width(self):