diff --git a/src/os/win32/ngx_win32_config.h b/src/os/win32/ngx_win32_config.h
index 2cb8e1988..ecdf6ad07 100644
--- a/src/os/win32/ngx_win32_config.h
+++ b/src/os/win32/ngx_win32_config.h
@@ -185,7 +185,7 @@ typedef unsigned int        ino_t;
 #endif
 
 
-#ifndef __MINGW64_VERSION_MAJOR
+#ifndef __GNUC__
 typedef int                 ssize_t;
 #endif