diff --git a/src/quick/items/qquickshadereffect.cpp b/src/quick/items/qquickshadereffect.cpp
index 97d0c581b7..0ff474a7ef 100644
--- a/src/quick/items/qquickshadereffect.cpp
+++ b/src/quick/items/qquickshadereffect.cpp
@@ -1311,7 +1311,7 @@ bool QQuickShaderEffectImpl::updateShader(Shader shaderType, const QUrl &fileUrl
 
     disconnectSignals(shaderType);
 
-    m_shaders[shaderType].shaderInfo = QSGGuiThreadShaderEffectManager::ShaderInfo();
+    m_shaders[shaderType].shaderInfo.variables.clear();
     m_shaders[shaderType].varData.clear();
 
     if (!fileUrl.isEmpty()) {
diff --git a/src/quick/scenegraph/qsgadaptationlayer_p.h b/src/quick/scenegraph/qsgadaptationlayer_p.h
index c20a99a8a9..6042ba67b0 100644
--- a/src/quick/scenegraph/qsgadaptationlayer_p.h
+++ b/src/quick/scenegraph/qsgadaptationlayer_p.h
@@ -256,7 +256,6 @@ public:
             Texture // for APIs with separate texture and sampler objects
         };
         struct Variable {
-            Variable() {}
             VariableType type = Constant;
             QByteArray name;
             uint offset = 0; // for cbuffer members