diff --git a/Foundation/src/File_UNIX.cpp b/Foundation/src/File_UNIX.cpp
index f89a92ef3..5bf78e6da 100644
--- a/Foundation/src/File_UNIX.cpp
+++ b/Foundation/src/File_UNIX.cpp
@@ -380,7 +380,7 @@ void FileImpl::copyToImpl(const std::string& path, bool failOnOverwrite) const
 }
 
 
-void FileImpl::renameToImpl(const std::string& path, bool failOnOverwrite = false)
+void FileImpl::renameToImpl(const std::string& path, bool failOnOverwrite)
 {
 	poco_assert (!_path.empty());