diff --git a/source/MaterialXGenMdl/Nodes/ConvolutionNode.cpp b/source/MaterialXGenMdl/Nodes/ConvolutionNode.cpp
index e9e97c0e23..02a8c8e0dd 100644
--- a/source/MaterialXGenMdl/Nodes/ConvolutionNode.cpp
+++ b/source/MaterialXGenMdl/Nodes/ConvolutionNode.cpp
@@ -86,12 +86,12 @@ const ShaderInput* ConvolutionNode::getSamplingInput(const ShaderNode& node) con
     if (node.hasClassification(ShaderNode::Classification::SAMPLE2D))
     {
         const ShaderInput* input = node.getInput(SAMPLE2D_INPUT);
-        return input->getType() == Type::VECTOR2 ? input : nullptr;
+        return input && input->getType() == Type::VECTOR2 ? input : nullptr;
     }
     else if (node.hasClassification(ShaderNode::Classification::SAMPLE3D))
     {
         const ShaderInput* input = node.getInput(SAMPLE3D_INPUT);
-        return input->getType() == Type::VECTOR3 ? input : nullptr;
+        return input && input->getType() == Type::VECTOR3 ? input : nullptr;
     }
     return nullptr;
 }