diff --git a/include/Nazara/Core/Bitset.inl b/include/Nazara/Core/Bitset.inl
index 21457d7c7..d29315afd 100644
--- a/include/Nazara/Core/Bitset.inl
+++ b/include/Nazara/Core/Bitset.inl
@@ -121,7 +121,7 @@ namespace Nz
 		if (sizeof(T) <= sizeof(Block))
 		{
 			m_bitCount = std::numeric_limits<T>::digits;
-			m_blocks.push_back(value);
+			m_blocks.push_back(static_cast<Block>(value));
 		}
 		else
 		{
diff --git a/src/Nazara/Utility/Formats/OBJSaver.cpp b/src/Nazara/Utility/Formats/OBJSaver.cpp
index 534eb1952..6ed15e717 100644
--- a/src/Nazara/Utility/Formats/OBJSaver.cpp
+++ b/src/Nazara/Utility/Formats/OBJSaver.cpp
@@ -35,12 +35,12 @@ namespace Nz
 				{
 				}
 
-				std::size_t GetCount() const
+				UInt32 GetCount() const
 				{
 					return m_count;
 				}
 
-				std::size_t Insert(const T& data)
+				UInt32 Insert(const T& data)
 				{
 					auto it = m_cache.find(data);
 					if (it == m_cache.end())
@@ -54,8 +54,8 @@ namespace Nz
 				}
 
 			private:
-				std::size_t m_count;
-				std::map<T, std::size_t> m_cache;
+				UInt32 m_count;
+				std::map<T, UInt32> m_cache;
 				T* m_buffer;
 		};
 
@@ -172,7 +172,7 @@ namespace Nz
 					SparsePtr<Vector3f> positionPtr = vertexMapper.GetComponentPtr<Vector3f>(VertexComponent_Position);
 					SparsePtr<Vector2f> texCoordsPtr = vertexMapper.GetComponentPtr<Vector2f>(VertexComponent_TexCoord);
 
-					std::size_t faceIndex = 0;
+					UInt32 faceIndex = 0;
 					TriangleIterator triangle(staticMesh);
 					do 
 					{
@@ -184,7 +184,7 @@ namespace Nz
 						{
 							OBJParser::FaceVertex& vertexIndices = meshes[i].vertices[face.firstVertex + j];
 
-							std::size_t index = triangle[j];
+							UInt32 index = triangle[j];
 							vertexIndices.normal = normalCache.Insert(normalPtr[index]);
 							vertexIndices.position = positionCache.Insert(positionPtr[index]);
 							vertexIndices.texCoord = texCoordsCache.Insert(texCoordsPtr[index]);