diff --git a/Minecraft.Client/Windows64/Windows64_Minecraft.cpp b/Minecraft.Client/Windows64/Windows64_Minecraft.cpp
index 4ec1d043..e952391b 100644
--- a/Minecraft.Client/Windows64/Windows64_Minecraft.cpp
+++ b/Minecraft.Client/Windows64/Windows64_Minecraft.cpp
@@ -76,6 +76,8 @@ DWORD dwProfileSettingsA[NUM_PROFILE_VALUES]=
 //-------------------------------------------------------------------------------------
 
 BOOL g_bWidescreen = TRUE;
+BOOL g_bResolutionSetByCMD = FALSE;
+
 int g_iScreenWidth = 1920;
 int g_iScreenHeight = 1080;
 
diff --git a/Minecraft.Client/Windows64/Windows64_Minecraft.h b/Minecraft.Client/Windows64/Windows64_Minecraft.h
index 186756bb..673d8261 100644
--- a/Minecraft.Client/Windows64/Windows64_Minecraft.h
+++ b/Minecraft.Client/Windows64/Windows64_Minecraft.h
@@ -7,7 +7,7 @@ extern BOOL g_bWidescreen;
 extern int g_iScreenWidth;
 extern int g_iScreenHeight;
 
-BOOL g_bResolutionSetByCMD = FALSE;
+extern BOOL g_bResolutionSetByCMD;
 
 extern ID3D11Device* g_pd3dDevice;