diff --git a/src/Trade/PhongMaterialData.cpp b/src/Trade/PhongMaterialData.cpp
index 04c3bd749..c6bb210a9 100644
--- a/src/Trade/PhongMaterialData.cpp
+++ b/src/Trade/PhongMaterialData.cpp
@@ -27,33 +27,33 @@
 namespace Magnum { namespace Trade {
 
 Vector3& PhongMaterialData::ambientColor() {
-    CORRADE_ASSERT(!(_flags & Flag::AmbientTexture), "Trade::PhongMaterialData::ambientColor(): the material has ambient texture", _ambient.color);
-    return _ambient.color;
+    CORRADE_ASSERT(!(_flags & Flag::AmbientTexture), "Trade::PhongMaterialData::ambientColor(): the material has ambient texture", _ambient.color());
+    return _ambient.color();
 }
 
 UnsignedInt& PhongMaterialData::ambientTexture() {
-    CORRADE_ASSERT(_flags & Flag::AmbientTexture, "Trade::PhongMaterialData::ambientTexture(): the material doesn't have ambient texture", _ambient.texture);
-    return _ambient.texture;
+    CORRADE_ASSERT(_flags & Flag::AmbientTexture, "Trade::PhongMaterialData::ambientTexture(): the material doesn't have ambient texture", _ambient.texture());
+    return _ambient.texture();
 }
 
 Vector3& PhongMaterialData::diffuseColor() {
-    CORRADE_ASSERT(!(_flags & Flag::DiffuseTexture), "Trade::PhongMaterialData::diffuseColor(): the material has diffuse texture", _diffuse.color);
-    return _diffuse.color;
+    CORRADE_ASSERT(!(_flags & Flag::DiffuseTexture), "Trade::PhongMaterialData::diffuseColor(): the material has diffuse texture", _diffuse.color());
+    return _diffuse.color();
 }
 
 UnsignedInt& PhongMaterialData::diffuseTexture() {
-    CORRADE_ASSERT(_flags & Flag::DiffuseTexture, "Trade::PhongMaterialData::diffuseTexture(): the material doesn't have diffuse texture", _diffuse.texture);
-    return _diffuse.texture;
+    CORRADE_ASSERT(_flags & Flag::DiffuseTexture, "Trade::PhongMaterialData::diffuseTexture(): the material doesn't have diffuse texture", _diffuse.texture());
+    return _diffuse.texture();
 }
 
 Vector3& PhongMaterialData::specularColor() {
-    CORRADE_ASSERT(!(_flags & Flag::SpecularTexture), "Trade::PhongMaterialData::specularColor(): the material has specular texture", _specular.color);
-    return _specular.color;
+    CORRADE_ASSERT(!(_flags & Flag::SpecularTexture), "Trade::PhongMaterialData::specularColor(): the material has specular texture", _specular.color());
+    return _specular.color();
 }
 
 UnsignedInt& PhongMaterialData::specularTexture() {
-    CORRADE_ASSERT(_flags & Flag::SpecularTexture, "Trade::PhongMaterialData::specularTexture(): the material doesn't have specular texture", _specular.texture);
-    return _specular.texture;
+    CORRADE_ASSERT(_flags & Flag::SpecularTexture, "Trade::PhongMaterialData::specularTexture(): the material doesn't have specular texture", _specular.texture());
+    return _specular.texture();
 }
 
 }}
diff --git a/src/Trade/PhongMaterialData.h b/src/Trade/PhongMaterialData.h
index 92ef09a49..ab65bf4f9 100644
--- a/src/Trade/PhongMaterialData.h
+++ b/src/Trade/PhongMaterialData.h
@@ -134,12 +134,28 @@ class MAGNUM_EXPORT PhongMaterialData: public AbstractMaterialData {
         Float shininess() const { return _shininess; }
 
     private:
+        #ifndef CORRADE_GCC45_COMPATIBILITY
         union Source {
             Source() {}
 
-            Vector3 color;
-            UnsignedInt texture;
+            public:
+                Vector3& color() { return color; }
+                UnsignedInt& texture() { return texture; }
+
+            private:
+                Vector3 _color;
+                UnsignedInt _texture;
+        };
+        #else
+        class Source {
+            public:
+                Vector3& color() { return *reinterpret_cast<Vector3*>(&data); }
+                UnsignedInt& texture() { return *reinterpret_cast<UnsignedInt*>(&data); }
+
+            private:
+                char data[sizeof(Vector3)];
         };
+        #endif
 
         Source _ambient,
             _diffuse,