diff --git a/lib/Basic/FileManager.cpp b/lib/Basic/FileManager.cpp
index 666c984..2db6054 100644
--- a/lib/Basic/FileManager.cpp
+++ b/lib/Basic/FileManager.cpp
@@ -29,7 +29,7 @@
 #include <sys/stat.h>
 
 #if defined(_MSC_VER)
-#defisstne S_ISDIR(s) (_S_IFDIR & s)
+#define S_ISDIR(s) (_S_IFDIR & s)
 #endif
 
 /// NON_EXISTENT_DIR - A special value distinct from null that is used to