diff --git a/DirectXTex/DirectXTexUtil.cpp b/DirectXTex/DirectXTexUtil.cpp
index 795d9f2..6f4e549 100644
--- a/DirectXTex/DirectXTexUtil.cpp
+++ b/DirectXTex/DirectXTexUtil.cpp
@@ -37,12 +37,12 @@ namespace
     //-------------------------------------------------------------------------------------
     struct WICTranslate
     {
-        GUID        wic;
+        const GUID& wic;
         DXGI_FORMAT format;
         bool        srgb;
     };
 
-    const WICTranslate g_WICFormats[] =
+    constexpr WICTranslate g_WICFormats[] =
     {
         { GUID_WICPixelFormat128bppRGBAFloat,       DXGI_FORMAT_R32G32B32A32_FLOAT,         false },
 
diff --git a/DirectXTex/DirectXTexWIC.cpp b/DirectXTex/DirectXTexWIC.cpp
index 9b73048..57315a4 100644
--- a/DirectXTex/DirectXTexWIC.cpp
+++ b/DirectXTex/DirectXTexWIC.cpp
@@ -79,12 +79,12 @@ namespace
 
     struct WICConvert
     {
-        GUID            source;
-        GUID            target;
+        const GUID&     source;
+        const GUID&     target;
         TEX_ALPHA_MODE  alphaMode;
     };
 
-    const WICConvert g_WICConvert[] =
+    constexpr WICConvert g_WICConvert[] =
     {
         // Directly support the formats listed in XnaTexUtil::g_WICFormats, so no conversion required
         // Note target GUID in this conversion table must be one of those directly supported formats.
diff --git a/WICTextureLoader/WICTextureLoader11.cpp b/WICTextureLoader/WICTextureLoader11.cpp
index a0f3402..3cb23bc 100644
--- a/WICTextureLoader/WICTextureLoader11.cpp
+++ b/WICTextureLoader/WICTextureLoader11.cpp
@@ -63,11 +63,11 @@ namespace
     //-------------------------------------------------------------------------------------
     struct WICTranslate
     {
-        GUID                wic;
+        const GUID&         wic;
         DXGI_FORMAT         format;
     };
 
-    const WICTranslate g_WICFormats[] =
+    constexpr WICTranslate g_WICFormats[] =
     {
         { GUID_WICPixelFormat128bppRGBAFloat,       DXGI_FORMAT_R32G32B32A32_FLOAT },
 
@@ -98,11 +98,11 @@ namespace
 
     struct WICConvert
     {
-        GUID        source;
-        GUID        target;
+        const GUID&        source;
+        const GUID&        target;
     };
 
-    const WICConvert g_WICConvert[] =
+    constexpr WICConvert g_WICConvert[] =
     {
         // Note target GUID in this conversion table must be one of those directly supported formats (above).
 
diff --git a/WICTextureLoader/WICTextureLoader12.cpp b/WICTextureLoader/WICTextureLoader12.cpp
index 9970479..de8cee2 100644
--- a/WICTextureLoader/WICTextureLoader12.cpp
+++ b/WICTextureLoader/WICTextureLoader12.cpp
@@ -50,11 +50,11 @@ namespace
     //-------------------------------------------------------------------------------------
     struct WICTranslate
     {
-        GUID                wic;
+        const GUID&         wic;
         DXGI_FORMAT         format;
     };
 
-    const WICTranslate g_WICFormats[] =
+    constexpr WICTranslate g_WICFormats[] =
     {
         { GUID_WICPixelFormat128bppRGBAFloat,       DXGI_FORMAT_R32G32B32A32_FLOAT },
 
@@ -87,11 +87,11 @@ namespace
 
     struct WICConvert
     {
-        GUID        source;
-        GUID        target;
+        const GUID&        source;
+        const GUID&        target;
     };
 
-    const WICConvert g_WICConvert[] =
+    constexpr WICConvert g_WICConvert[] =
     {
         // Note target GUID in this conversion table must be one of those directly supported formats (above).
 
diff --git a/WICTextureLoader/WICTextureLoader9.cpp b/WICTextureLoader/WICTextureLoader9.cpp
index f68b4f9..2083216 100644
--- a/WICTextureLoader/WICTextureLoader9.cpp
+++ b/WICTextureLoader/WICTextureLoader9.cpp
@@ -47,11 +47,11 @@ namespace
     //-------------------------------------------------------------------------------------
     struct WICTranslate
     {
-        GUID                wic;
+        const GUID&         wic;
         D3DFORMAT           format;
     };
 
-    const WICTranslate g_WICFormats[] =
+    constexpr WICTranslate g_WICFormats[] =
     {
         { GUID_WICPixelFormat128bppRGBAFloat,       D3DFMT_A32B32G32R32F },
 
@@ -80,11 +80,11 @@ namespace
 
     struct WICConvert
     {
-        GUID        source;
-        GUID        target;
+        const GUID&        source;
+        const GUID&        target;
     };
 
-    const WICConvert g_WICConvert[] =
+    constexpr WICConvert g_WICConvert[] =
     {
         // Note target GUID in this conversion table must be one of those directly supported formats (above).