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-rw-r--r--src/libutil/util.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libutil/util.hh b/src/libutil/util.hh
index 0ebf6f5a5f65..3c4629957a7b 100644
--- a/src/libutil/util.hh
+++ b/src/libutil/util.hh
@@ -70,7 +70,7 @@ void deletePath(const Path & path, unsigned long long & bytesFreed);
 void makePathReadOnly(const Path & path);
 
 /* Create a temporary directory. */
-Path createTempDir();
+Path createTempDir(const Path & tmpRoot = "");
 
 /* Create a directory and all its parents, if necessary. */
 void createDirs(const Path & path);