diff --git a/core/libs/tests/GuestPosixSpawn.cpp b/core/libs/tests/GuestPosixSpawn.cpp
index d71e652950..04a204b538 100644
--- a/core/libs/tests/GuestPosixSpawn.cpp
+++ b/core/libs/tests/GuestPosixSpawn.cpp
@@ -21,7 +21,7 @@
 extern "C" int kill(int, int);
 #endif
 
-#if defined(__linux__)
+#ifndef _WIN32
 extern char** environ;
 #endif