Merge "Test for _WIN32 in frameworks/compile/slang instead of USE_MINGW."
diff --git a/os_sep.h b/os_sep.h
index 832e8fe..b7f7346 100644
--- a/os_sep.h
+++ b/os_sep.h
@@ -17,12 +17,12 @@
#ifndef _FRAMEWORKS_COMPILE_SLANG_OS_SEP_H_ // NOLINT
#define _FRAMEWORKS_COMPILE_SLANG_OS_SEP_H_
-#ifdef USE_MINGW
+#ifdef _WIN32
/* Define the default path separator for the platform. */
#define OS_PATH_SEPARATOR '\\'
#define OS_PATH_SEPARATOR_STR "\\"
-#else /* not USE_MINGW */
+#else /* not _WIN32 */
/* Define the default path separator for the platform. */
#define OS_PATH_SEPARATOR '/'