diff --git a/src/libutil/file-system.cc b/src/libutil/file-system.cc
index 989f6a4c8..71d08ff47 100644
--- a/src/libutil/file-system.cc
+++ b/src/libutil/file-system.cc
@@ -469,7 +469,7 @@ void deletePath(const Path & path)
     deletePath(path, dummy);
 }
 
-void createDir(const Path &path, mode_t mode)
+void createDir(const Path & path, mode_t mode)
 {
     if (mkdir(path.c_str(), mode) == -1)
         throw SysError("creating directory '%1%'", path);