diff --git a/clang/tools/clang-format/clang-format.py b/clang/tools/clang-format/clang-format.py
index 03493560f43b..a79205a6dfe8 100644
--- a/clang/tools/clang-format/clang-format.py
+++ b/clang/tools/clang-format/clang-format.py
@@ -26,7 +26,7 @@ import vim
 # set g:clang_format_path to the path to clang-format if it is not on the path
 # Change this to the full path if clang-format is not on the path.
 binary = 'clang-format'
-if vim.eval('exists("g:clang_format_path")'):
+if vim.eval('exists("g:clang_format_path")') == "1":
   binary = vim.eval('g:clang_format_path')
 
 # Change this to format according to other formatting styles. See the output of