diff --git a/src/Magnum/TextureTools/Test/DistanceFieldGLTest.cpp b/src/Magnum/TextureTools/Test/DistanceFieldGLTest.cpp
index 831b9b423..b3c7f94dd 100644
--- a/src/Magnum/TextureTools/Test/DistanceFieldGLTest.cpp
+++ b/src/Magnum/TextureTools/Test/DistanceFieldGLTest.cpp
@@ -194,7 +194,8 @@ void DistanceFieldGLTest::test() {
     /* In some cases actualOutputImage might have GL-specific format,
        reinterpret as R8Unorm for the comparison to work */
     if(actualOutputImage->format() == pixelFormatWrap(GL::PixelFormat::Red)) {
-        actualOutputImage = Image2D{actualOutputImage->storage(), PixelFormat::R8Unorm, actualOutputImage->size(), actualOutputImage->release()};
+        const Vector2i imageSize = actualOutputImage->size();
+        actualOutputImage = Image2D{actualOutputImage->storage(), PixelFormat::R8Unorm, imageSize, actualOutputImage->release()};
     }
     #endif