diff --git a/libs/win32/pthread/pthread.vcproj b/libs/win32/pthread/pthread.vcproj
index a4ad7f6f43..eec775fedc 100644
--- a/libs/win32/pthread/pthread.vcproj
+++ b/libs/win32/pthread/pthread.vcproj
@@ -50,7 +50,7 @@
 				Optimization="2"
 				InlineFunctionExpansion="1"
 				AdditionalIncludeDirectories="../../pthreads-w32-2-7-0-release/"
-				PreprocessorDefinitions="__CLEANUP_C;WIN32;NDEBUG;_WINDOWS;_USRDLL;PTW32_BUILD;_CRT_SECURE_NO_DEPRECATE"
+				PreprocessorDefinitions="__CLEANUP_C;WIN32;NDEBUG;_WINDOWS;_USRDLL;PTW32_BUILD;_CRT_SECURE_NO_DEPRECATE;PTW32_STATIC_LIB"
 				StringPooling="true"
 				RuntimeLibrary="2"
 				EnableFunctionLevelLinking="true"
@@ -130,7 +130,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="0"
 				AdditionalIncludeDirectories="../../pthreads-w32-2-7-0-release/"
-				PreprocessorDefinitions="__CLEANUP_C;WIN32;_DEBUG;_WINDOWS;_USRDLL;PTW32_BUILD;_CRT_SECURE_NO_DEPRECATE"
+				PreprocessorDefinitions="__CLEANUP_C;WIN32;_DEBUG;_WINDOWS;_USRDLL;PTW32_BUILD;_CRT_SECURE_NO_DEPRECATE;PTW32_STATIC_LIB"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="3"