diff --git a/src/Transform/ONNX/ConstProp.cpp b/src/Transform/ONNX/ConstProp.cpp
index f36acdd197..cc31b13da5 100644
--- a/src/Transform/ONNX/ConstProp.cpp
+++ b/src/Transform/ONNX/ConstProp.cpp
@@ -69,7 +69,7 @@ struct ConstPropONNXToONNXPassConfiguration {
 };
 
 int ConstPropONNXToONNXPassConfiguration::expansionBound = -1; // -1 == no bound
-StringSet<> ConstPropONNXToONNXPassConfiguration::disabledPatterns;
+StringSet<> ConstPropONNXToONNXPassConfiguration::disabledPatterns = {};
 bool ConstPropONNXToONNXPassConfiguration::constantPropIsEnabled = false;
 
 // Precondition: result has ranked tensor type with static shape and int or
diff --git a/test/mlir/onnx/onnx_hybrid_transform.mlir b/test/mlir/onnx/onnx_hybrid_transform.mlir
index a1ad2b538f..7962e8e1c0 100644
--- a/test/mlir/onnx/onnx_hybrid_transform.mlir
+++ b/test/mlir/onnx/onnx_hybrid_transform.mlir
@@ -1,5 +1,5 @@
-// RUN: onnx-mlir-opt -onnx-hybrid-transform=constant-propagation=false %s | FileCheck %s
-// RUN: onnx-mlir-opt -onnx-hybrid-transform %s | FileCheck --check-prefix=CONSTPROP %s
+// RUN: onnx-mlir-opt --enable-constant-prop=true -onnx-hybrid-transform=constant-propagation=false %s | FileCheck %s
+// RUN: onnx-mlir-opt --enable-constant-prop=true -onnx-hybrid-transform %s | FileCheck --check-prefix=CONSTPROP %s
 
 // Illustrates the back and forth between shape inference and the
 // BinaryOpBroadcastAxisPattern canonicalization pattern: