diff --git a/code/IRRLoader.cpp b/code/IRRLoader.cpp
index 6e2a9a5b5..1056893f5 100644
--- a/code/IRRLoader.cpp
+++ b/code/IRRLoader.cpp
@@ -215,7 +215,7 @@ void IRRImporter::BuildSkybox(std::vector<aiMesh*>& meshes, std::vector<aiMateri
         SkyboxVertex( l,-l,-l,  0, 0, 1,   0.0,1.0),
         SkyboxVertex( l, l,-l,  0, 0, 1,   0.0,0.0),
         SkyboxVertex(-l, l,-l,  0, 0, 1,   1.0,0.0)) );
-    meshes.back()->mMaterialIndex = materials.size()-6u;
+    meshes.back()->mMaterialIndex = static_cast<unsigned int>(materials.size()-6u);
 
     // LEFT SIDE
     meshes.push_back( BuildSingleQuadMesh(
@@ -223,7 +223,7 @@ void IRRImporter::BuildSkybox(std::vector<aiMesh*>& meshes, std::vector<aiMateri
         SkyboxVertex( l,-l, l,  -1, 0, 0,   0.0,1.0),
         SkyboxVertex( l, l, l,  -1, 0, 0,   0.0,0.0),
         SkyboxVertex( l, l,-l,  -1, 0, 0,   1.0,0.0)) );
-    meshes.back()->mMaterialIndex = materials.size()-5u;
+    meshes.back()->mMaterialIndex = static_cast<unsigned int>(materials.size()-5u);
 
     // BACK SIDE
     meshes.push_back( BuildSingleQuadMesh(
@@ -231,7 +231,7 @@ void IRRImporter::BuildSkybox(std::vector<aiMesh*>& meshes, std::vector<aiMateri
         SkyboxVertex(-l,-l, l,  0, 0, -1,   0.0,1.0),
         SkyboxVertex(-l, l, l,  0, 0, -1,   0.0,0.0),
         SkyboxVertex( l, l, l,  0, 0, -1,   1.0,0.0)) );
-    meshes.back()->mMaterialIndex = materials.size()-4u;
+    meshes.back()->mMaterialIndex = static_cast<unsigned int>(materials.size()-4u);
 
     // RIGHT SIDE
     meshes.push_back( BuildSingleQuadMesh(
@@ -239,7 +239,7 @@ void IRRImporter::BuildSkybox(std::vector<aiMesh*>& meshes, std::vector<aiMateri
         SkyboxVertex(-l,-l,-l,  1, 0, 0,   0.0,1.0),
         SkyboxVertex(-l, l,-l,  1, 0, 0,   0.0,0.0),
         SkyboxVertex(-l, l, l,  1, 0, 0,   1.0,0.0)) );
-    meshes.back()->mMaterialIndex = materials.size()-3u;
+    meshes.back()->mMaterialIndex = static_cast<unsigned int>(materials.size()-3u);
 
     // TOP SIDE
     meshes.push_back( BuildSingleQuadMesh(
@@ -247,7 +247,7 @@ void IRRImporter::BuildSkybox(std::vector<aiMesh*>& meshes, std::vector<aiMateri
         SkyboxVertex( l, l, l,  0, -1, 0,   0.0,1.0),
         SkyboxVertex(-l, l, l,  0, -1, 0,   0.0,0.0),
         SkyboxVertex(-l, l,-l,  0, -1, 0,   1.0,0.0)) );
-    meshes.back()->mMaterialIndex = materials.size()-2u;
+    meshes.back()->mMaterialIndex = static_cast<unsigned int>(materials.size()-2u);
 
     // BOTTOM SIDE
     meshes.push_back( BuildSingleQuadMesh(
@@ -255,7 +255,7 @@ void IRRImporter::BuildSkybox(std::vector<aiMesh*>& meshes, std::vector<aiMateri
         SkyboxVertex( l,-l,-l,  0,  1, 0,   1.0,0.0),
         SkyboxVertex(-l,-l,-l,  0,  1, 0,   1.0,1.0),
         SkyboxVertex(-l,-l, l,  0,  1, 0,   0.0,1.0)) );
-    meshes.back()->mMaterialIndex = materials.size()-1u;
+    meshes.back()->mMaterialIndex = static_cast<unsigned int>(materials.size()-1u);
 }
 
 // ------------------------------------------------------------------------------------------------
@@ -641,7 +641,7 @@ void SetupMapping (aiMaterial* mat, aiTextureMapping mode, const aiVector3D& axi
         delete[] mat->mProperties;
         mat->mProperties = new aiMaterialProperty*[p.size()*2];
 
-        mat->mNumAllocated = p.size()*2;
+        mat->mNumAllocated = static_cast<unsigned int>(p.size()*2);
     }
     mat->mNumProperties = (unsigned int)p.size();
     ::memcpy(mat->mProperties,&p[0],sizeof(void*)*mat->mNumProperties);
diff --git a/code/irrXMLWrapper.h b/code/irrXMLWrapper.h
index 41e418811..5b47faefe 100644
--- a/code/irrXMLWrapper.h
+++ b/code/irrXMLWrapper.h
@@ -92,7 +92,7 @@ public:
 
         // Remove null characters from the input sequence otherwise the parsing will utterly fail
         unsigned int size = 0;
-        unsigned int size_max = data.size();
+        unsigned int size_max = static_cast<unsigned int>(data.size());
         for(unsigned int i = 0; i < size_max; i++) {
             if(data[i] != '\0') {
                 data[size++] = data[i];
@@ -117,7 +117,7 @@ public:
             return 0;
         }
         if(t+sizeToRead>data.size()) {
-            sizeToRead = data.size()-t;
+            sizeToRead = static_cast<int>(data.size()-t);
         }
 
         memcpy(buffer,&data.front()+t,sizeToRead);