diff --git a/code/FBX/FBXExporter.cpp b/code/FBX/FBXExporter.cpp
index a0a46e09d..08f4bdbc9 100644
--- a/code/FBX/FBXExporter.cpp
+++ b/code/FBX/FBXExporter.cpp
@@ -1619,11 +1619,11 @@ void FBXExporter::WriteObjects ()
     std::unordered_set<const aiNode*> limbnodes;
     
     //actual bone nodes in fbx, without parenting-up
-    std::set<std::string> setAllBoneNamesInScene;
-    for(int m = 0; m < mScene->mNumMeshes; ++ m)
+    std::unordered_set<std::string> setAllBoneNamesInScene;
+    for(unsigned int m = 0; m < mScene->mNumMeshes; ++ m)
     {
         aiMesh* pMesh = mScene->mMeshes[m];
-        for(int b = 0; b < pMesh->mNumBones; ++ b)
+        for(unsigned int b = 0; b < pMesh->mNumBones; ++ b)
             setAllBoneNamesInScene.insert(pMesh->mBones[b]->mName.data);
     }
     aiMatrix4x4 mxTransIdentity;