2 files changed, 7 insertions, 0 deletions
diff --git a/src/core/compositor/delegated_frame_node.cpp b/src/core/compositor/delegated_frame_node.cpp
index 4d74937d9..d41d21e93 100644
--- a/src/core/compositor/delegated_frame_node.cpp
+++ b/src/core/compositor/delegated_frame_node.cpp
@@ -125,6 +125,12 @@ public:
     QSize textureSize() const override { return m_textureSize; }
     bool hasAlphaChannel() const override { return m_hasAlpha; }
     bool hasMipmaps() const override { return false; }
+    int comparisonKey() const override
+    {
+        if (m_textureId)
+            return m_textureId;
+        return int(qintptr(this));
+    }
     void bind() override;
 
 private:
diff --git a/src/core/compositor/display_gl_output_surface_qsg.cpp b/src/core/compositor/display_gl_output_surface_qsg.cpp
index 2f7b3de84..2ed24ef1d 100644
--- a/src/core/compositor/display_gl_output_surface_qsg.cpp
+++ b/src/core/compositor/display_gl_output_surface_qsg.cpp
@@ -76,6 +76,7 @@ public:
         QOpenGLFunctions *funcs = context->functions();
         funcs->glBindTexture(GL_TEXTURE_2D, m_id);
     }
+    int comparisonKey() const override { return m_id; }
 
 private:
     uint32_t m_id;