diff --git a/include/yaml.h b/include/yaml.h
index 92f6b5cb..01722eff 100644
--- a/include/yaml.h
+++ b/include/yaml.h
@@ -28,7 +28,7 @@ extern "C" {
 
 #if defined(__MINGW32__)
 #   define  YAML_DECLARE(type)  type
-#elif defined(WIN32)
+#elif defined(_WIN32)
 #   if defined(YAML_DECLARE_STATIC)
 #       define  YAML_DECLARE(type)  type
 #   elif defined(YAML_DECLARE_EXPORT)