diff --git a/src/rfuns_extension.cpp b/src/rfuns_extension.cpp
index 74ecd65..8cc692b 100644
--- a/src/rfuns_extension.cpp
+++ b/src/rfuns_extension.cpp
@@ -3,7 +3,6 @@
 #include "rfuns_extension.hpp"
 #include "duckdb.hpp"
 #include "duckdb/common/exception.hpp"
-#include "duckdb/common/string_util.hpp"
 #include "duckdb/function/scalar_function.hpp"
 #include "duckdb/main/extension_util.hpp"
 #include "duckdb/parser/parsed_data/create_scalar_function_info.hpp"