diff --git a/mlir/test/mlir-tblgen/op-python-bindings.td b/mlir/test/mlir-tblgen/op-python-bindings.td
index 9355fc4aeb3a..b5c824e66299 100644
--- a/mlir/test/mlir-tblgen/op-python-bindings.td
+++ b/mlir/test/mlir-tblgen/op-python-bindings.td
@@ -405,11 +405,11 @@ def VariadicAndNormalRegionOp : TestOp<"variadic_and_normal_region"> {
   let regions = (region AnyRegion:$region, AnyRegion, VariadicRegion<AnyRegion>:$variadic);
 
   // CHECK:  @builtins.property
-  // CHECK:  def region():
+  // CHECK:  def region(self):
   // CHECK:    return self.regions[0]
 
   // CHECK:  @builtins.property
-  // CHECK:  def variadic():
+  // CHECK:  def variadic(self):
   // CHECK:    return self.regions[2:]
 }
 
@@ -429,7 +429,7 @@ def VariadicRegionOp : TestOp<"variadic_region"> {
   let regions = (region VariadicRegion<AnyRegion>:$Variadic);
 
   // CHECK:  @builtins.property
-  // CHECK:  def Variadic():
+  // CHECK:  def Variadic(self):
   // CHECK:    return self.regions[0:]
 }
 
diff --git a/mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp b/mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp
index 039827ecf083..f55f0508a58b 100644
--- a/mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp
+++ b/mlir/tools/mlir-tblgen/OpPythonBindingGen.cpp
@@ -254,7 +254,7 @@ constexpr const char *attributeDeleterTemplate = R"Py(
 
 constexpr const char *regionAccessorTemplate = R"PY(
   @builtins.property
-  def {0}():
+  def {0}(self):
     return self.regions[{1}]
 )PY";