diff --git a/CMakeLists.txt b/CMakeLists.txt
index b5966fb..30f40b5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,7 +12,9 @@ option( BUILD_STATIC "Build a static version of library" ON )
 if( USE_SYSTEM_TZ_DB ) 
 	add_definitions( -DUSE_AUTOLOAD=0 )
 	add_definitions( -DHAS_REMOTE_API=0 )
-	add_definitions( -DUSE_OS_TZDB=1 )
+	if( NOT WIN32 ) 
+		add_definitions( -DUSE_OS_TZDB=1 )
+	endif( )
 else( )
 	add_definitions( -DUSE_AUTOLOAD=1 )
 	add_definitions( -DHAS_REMOTE_API=1 )