diff --git a/Engine/source/T3D/decal/decalManager.cpp b/Engine/source/T3D/decal/decalManager.cpp
index 39e90f159..7adce305d 100644
--- a/Engine/source/T3D/decal/decalManager.cpp
+++ b/Engine/source/T3D/decal/decalManager.cpp
@@ -87,7 +87,6 @@ const U32 DecalManager::smMaxIndices = 10000;
 DecalManager *gDecalManager = NULL;
 
 IMPLEMENT_CONOBJECT(DecalManager);
-DECLARE_CATEGORY("UNLISTED");
 
 ConsoleDoc(
    "@defgroup Decals\n"
diff --git a/Engine/source/console/runtime.h b/Engine/source/console/runtime.h
index cb2a32805..25ac604e4 100644
--- a/Engine/source/console/runtime.h
+++ b/Engine/source/console/runtime.h
@@ -12,7 +12,7 @@ namespace Con
       String error;
 
    public:
-      EvalResult() {}
+      EvalResult() { valid = false;  error = ""; }
 
       EvalResult(ConsoleValue pValue)
       {
diff --git a/Engine/source/core/dataChunker.h b/Engine/source/core/dataChunker.h
index cefefa2fe..226878711 100644
--- a/Engine/source/core/dataChunker.h
+++ b/Engine/source/core/dataChunker.h
@@ -41,7 +41,7 @@ public:
 
    struct alignas(uintptr_t) DataBlock : public AlignedBufferAllocator<T>
    {
-      DataBlock* mNext;
+      DataBlock* mNext = NULL;
 
       inline DataBlock* getEnd()
       {
diff --git a/Engine/source/core/util/tDictionary.h b/Engine/source/core/util/tDictionary.h
index 6c8c7d21f..f725a9bc5 100644
--- a/Engine/source/core/util/tDictionary.h
+++ b/Engine/source/core/util/tDictionary.h
@@ -179,8 +179,8 @@ class HashTable
 public:
    struct Pair
    {
-      Key  key;
-      Value value;
+      Key  key{};
+      Value value{};
       Pair() {}
       Pair(Key k,Value v)
          :  key(k),
diff --git a/Engine/source/core/util/tVector.h b/Engine/source/core/util/tVector.h
index 0700a5554..c7c4fc7a4 100644
--- a/Engine/source/core/util/tVector.h
+++ b/Engine/source/core/util/tVector.h
@@ -407,7 +407,7 @@ template<class T> inline void Vector<T>::insert(U32 index)
 
    dMemmove(&mArray[index + 1],
                     &mArray[index],
-                    (mElementCount - index - 1) * sizeof(value_type));
+                    dsize_t(mElementCount - index - 1) * sizeof(value_type));
    
    constructInPlace(&mArray[index]);
 }
@@ -428,7 +428,7 @@ template<class T> inline void Vector<T>::erase(U32 index)
    {
       dMemmove(&mArray[index],
          &mArray[index + 1],
-         (mElementCount - index - 1) * sizeof(value_type));
+         dsize_t(mElementCount - index - 1) * sizeof(value_type));
    }
 
    mElementCount--;
@@ -461,7 +461,7 @@ template<class T> inline void Vector<T>::erase(U32 index, U32 count)
 
    dMemmove(   &mArray[index],
                &mArray[index + count],
-               (mElementCount - index - count) * sizeof(value_type));
+               dsize_t(mElementCount - index - count) * sizeof(value_type));
 
    mElementCount -= count;
 }
diff --git a/Engine/source/gfx/bitmap/loaders/ies/ies_loader.cpp b/Engine/source/gfx/bitmap/loaders/ies/ies_loader.cpp
index 3df8c32bd..a5ac881ad 100644
--- a/Engine/source/gfx/bitmap/loaders/ies/ies_loader.cpp
+++ b/Engine/source/gfx/bitmap/loaders/ies/ies_loader.cpp
@@ -200,7 +200,7 @@ IESLoadHelper::load(const std::string& data, IESFileInfo& info)
 		info._anglesH.push_back(value);
 	}
 
-	info._candalaValues.reserve(info.anglesNumH * info.anglesNumV);
+	info._candalaValues.reserve(size_t(info.anglesNumH * info.anglesNumV));
 
 	for (std::int32_t y = 0; y < info.anglesNumH; ++y)
 	{
diff --git a/Engine/source/renderInstance/renderPassManager.h b/Engine/source/renderInstance/renderPassManager.h
index 8231370c8..2d4810ece 100644
--- a/Engine/source/renderInstance/renderPassManager.h
+++ b/Engine/source/renderInstance/renderPassManager.h
@@ -299,6 +299,7 @@ struct RenderInst
 
    /// Does a memset to clear the render instance.
    void clear();
+   RenderInst() { clear(); }
 };
 
 struct ObjectRenderInst : public RenderInst
@@ -327,6 +328,7 @@ struct ObjectRenderInst : public RenderInst
 
    // Clear this instance.
    void clear();
+   ObjectRenderInst() { clear(); }
 };
 
 struct MeshRenderInst : public RenderInst
@@ -397,6 +399,7 @@ struct MeshRenderInst : public RenderInst
    Vector<CustomShaderBindingData> mCustomShaderData;
 
    void clear();
+   MeshRenderInst() { clear(); };
 };
 
 enum ParticleSystemState
@@ -455,6 +458,7 @@ struct ParticleRenderInst : public RenderInst
    GFXTextureObject *diffuseTex;
 
    void clear();
+   ParticleRenderInst() { clear(); }
 };
 
 class GFXOcclusionQuery;
@@ -477,6 +481,7 @@ struct OccluderRenderInst : public RenderInst
    bool isSphere;
 
    void clear();
+   OccluderRenderInst() { clear(); }
 };
 
 #endif // _RENDERPASSMANAGER_H_