diff --git a/aesara/tensor/nnet/corr.py b/aesara/tensor/nnet/corr.py
index e89054d..77ed344 100644
--- a/aesara/tensor/nnet/corr.py
+++ b/aesara/tensor/nnet/corr.py
@@ -692,12 +692,12 @@ class CorrMM(BaseCorrMM):
             if kern.type.ndim != 4:
                 raise TypeError("kern must be 4D tensor")
 
-        out_shape = tuple(
+        out_shape = tuple([
             1 if img.type.shape[0] == 1 else None,
             1 if kern.type.shape[0] == 1 else None,
             None,
             None,
-        )
+        ])
         dtype = img.type.dtype
         return Apply(self, [img, kern], [TensorType(dtype, shape=out_shape)()])
 
