diff --git a/clang/lib/Lex/Lexer.cpp b/clang/lib/Lex/Lexer.cpp
index 9034726560dc..a51745697b11 100644
--- a/clang/lib/Lex/Lexer.cpp
+++ b/clang/lib/Lex/Lexer.cpp
@@ -2552,8 +2552,8 @@ bool Lexer::SkipBlockComment(Token &Result, const char *CurPtr,
         '/', '/', '/', '/',  '/', '/', '/', '/',
         '/', '/', '/', '/',  '/', '/', '/', '/'
       };
-      while (CurPtr+16 <= BufferEnd &&
-             !vec_any_eq(*(const vector unsigned char*)CurPtr, Slashes))
+      while (CurPtr + 16 <= BufferEnd &&
+             !vec_any_eq(*(const __vector unsigned char *)CurPtr, Slashes))
         CurPtr += 16;
 #else
       // Scan for '/' quickly.  Many block comments are very large.