diff --git a/regamedll/msvc/ReGameDLL.vcxproj b/regamedll/msvc/ReGameDLL.vcxproj
index 50d85ca3..3e882d9e 100644
--- a/regamedll/msvc/ReGameDLL.vcxproj
+++ b/regamedll/msvc/ReGameDLL.vcxproj
@@ -922,6 +922,7 @@
       <PreprocessorDefinitions>REGAMEDLL_ADD;REGAMEDLL_API;REGAMEDLL_FIXES;REGAMEDLL_SSE;REGAMEDLL_SELF;REGAMEDLL_CHECKS;UNICODE_FIXES;BUILD_LATEST;BUILD_LATEST_FIXES;CLIENT_WEAPONS;USE_QSTRING;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <FloatingPointModel>Fast</FloatingPointModel>
       <AdditionalOptions>/arch:IA32 %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions Condition="'$(PlatformToolset)' == 'v140_xp' OR '$(PlatformToolset)' == 'v141_xp'">/Zc:threadSafeInit- %(AdditionalOptions)</AdditionalOptions>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>precompiled.h</PrecompiledHeaderFile>
@@ -958,6 +959,7 @@
       <PreprocessorDefinitions>REGAMEDLL_ADD;REGAMEDLL_API;REGAMEDLL_FIXES;REGAMEDLL_SSE;REGAMEDLL_SELF;REGAMEDLL_CHECKS;UNICODE_FIXES;BUILD_LATEST;BUILD_LATEST_FIXES;CLIENT_WEAPONS;USE_QSTRING;_CRT_SECURE_NO_WARNINGS;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <FloatingPointModel>Fast</FloatingPointModel>
       <AdditionalOptions>/arch:IA32 %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions Condition="'$(PlatformToolset)' == 'v140_xp' OR '$(PlatformToolset)' == 'v141_xp'">/Zc:threadSafeInit- %(AdditionalOptions)</AdditionalOptions>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>precompiled.h</PrecompiledHeaderFile>
@@ -1003,6 +1005,7 @@
       <PreprocessorDefinitions>PLAY_GAMEDLL;REGAMEDLL_SELF;REGAMEDLL_CHECKS;REGAMEDLL_API;REGAMEDLL_SSE;CLIENT_WEAPONS;USE_QSTRING;_CRT_SECURE_NO_WARNINGS;NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <FloatingPointModel>Precise</FloatingPointModel>
       <AdditionalOptions>/arch:IA32 %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions Condition="'$(PlatformToolset)' == 'v140_xp' OR '$(PlatformToolset)' == 'v141_xp'">/Zc:threadSafeInit- %(AdditionalOptions)</AdditionalOptions>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>precompiled.h</PrecompiledHeaderFile>
@@ -1048,6 +1051,7 @@
       <PreprocessorDefinitions>PLAY_GAMEDLL;REGAMEDLL_SSE;REGAMEDLL_SELF;REGAMEDLL_CHECKS;REGAMEDLL_API;CLIENT_WEAPONS;USE_QSTRING;_CRT_SECURE_NO_WARNINGS;_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <FloatingPointModel>Precise</FloatingPointModel>
       <AdditionalOptions>/arch:IA32 %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions Condition="'$(PlatformToolset)' == 'v140_xp' OR '$(PlatformToolset)' == 'v141_xp'">/Zc:threadSafeInit- %(AdditionalOptions)</AdditionalOptions>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <PrecompiledHeaderFile>precompiled.h</PrecompiledHeaderFile>