diff --git a/src/Trade/ImageData.h b/src/Trade/ImageData.h
index a0383d806..d225db8bf 100644
--- a/src/Trade/ImageData.h
+++ b/src/Trade/ImageData.h
@@ -69,7 +69,7 @@ template<std::uint8_t dimensions> class ImageData: public AbstractImage {
         inline std::string name() const { return _name; }
 
         /** @brief %Image size */
-        inline constexpr typename DimensionTraits<Dimensions, GLsizei>::VectorType& size() const { return _size; }
+        inline constexpr typename DimensionTraits<Dimensions, GLsizei>::VectorType size() const { return _size; }
 
         /** @brief Pointer to raw data */
         inline void* data() { return _data; }