diff --git a/CMakeLists.txt b/CMakeLists.txt
index e0824df..ed1aa1a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,6 +7,9 @@ add_definitions(/D_WIN32 /D_WINDOWS /DWINDOWS=1 /DZEND_WIN32=1 /DPHP_WIN32=1 /DW
 if(NOT CMAKE_CL_64)
 add_definitions(-D_USE_32BIT_TIME_T)
 endif(NOT CMAKE_CL_64)
+if(WITH_THREAD_SAFETY)
+add_definitions(-DZTS=1)
+endif(WITH_THREAD_SAFETY)
 ENDIF(WIN32)
 string(SUBSTRING $ENV{VSCMD_VER} 0 2 VSCMD_VER)
 
@@ -20,5 +23,8 @@ set_property(SOURCE example.i PROPERTY CPLUSPLUS ON)
 add_library(example STATIC example.cxx)
 swig_add_library(php_example TYPE MODULE LANGUAGE php7 SOURCES example.i)
 target_compile_options(php_example PRIVATE /D_WIN32 /D_WINDOWS /DWINDOWS=1 /DZEND_WIN32=1 /DPHP_WIN32=1 /DWIN32 /DNDebug /DNDEBUG /DZEND_DEBUG=0)
-SWIG_LINK_LIBRARIES(php_example "C:/php-sdk/phpmaster/vc${VSCMD_VER}/$ENV{VSCMD_ARG_TGT_ARCH}/php-src/$ENV{VSCMD_ARG_TGT_ARCH}/Release/php7.lib")
+if(WITH_THREAD_SAFETY)
+target_compile_options(php_example PRIVATE /DZTS=1)
+endif(WITH_THREAD_SAFETY)
+SWIG_LINK_LIBRARIES(php_example "C:/php-sdk/phpmaster/vc${VSCMD_VER}/$ENV{VSCMD_ARG_TGT_ARCH}/php-src/$ENV{VSCMD_ARG_TGT_ARCH}/Release_TS/php7ts.lib")
 target_link_libraries(php_example example)