diff --git a/src/libutil/file-system.cc b/src/libutil/file-system.cc
index 458238883..22c84b193 100644
--- a/src/libutil/file-system.cc
+++ b/src/libutil/file-system.cc
@@ -421,7 +421,7 @@ 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);