2 files changed, 9 insertions, 0 deletions
diff --git a/src/resources/subimage.cpp b/src/resources/subimage.cpp
index af579e4ec..1eac0d89d 100644
--- a/src/resources/subimage.cpp
+++ b/src/resources/subimage.cpp
@@ -222,3 +222,10 @@ void SubImage::decRef()
     Resource::decRef();
 }
 #endif
+
+int SubImage::calcMemoryLocal()
+{
+    int sz = sizeof(SubImage) +
+        sizeof(std::map<float, SDL_Surface*>);
+    return sz;
+}
diff --git a/src/resources/subimage.h b/src/resources/subimage.h
index e7184574d..95c5f4100 100644
--- a/src/resources/subimage.h
+++ b/src/resources/subimage.h
@@ -78,6 +78,8 @@ class SubImage final : public Image
                            const int width,
                            const int height) override final A_WARN_UNUSED;
 
+        int calcMemoryLocal() override;
+
 #ifdef USE_OPENGL
         void decRef() override final;
 #endif