diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0397053..b080c9b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@ set(EXTENSION_NAME ${TARGET_NAME}_extension)
 set(LOADABLE_EXTENSION_NAME ${TARGET_NAME}_loadable_extension)
 
 project(${TARGET_NAME})
-include_directories(src/include)
+include_directories(src/include duckdb/src/include)
 
 set(EXTENSION_SOURCES src/rfuns_extension.cpp)
 
diff --git a/src/rfuns_extension.cpp b/src/rfuns_extension.cpp
index 3963a85..74ecd65 100644
--- a/src/rfuns_extension.cpp
+++ b/src/rfuns_extension.cpp
@@ -6,7 +6,7 @@
 #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>
+#include "duckdb/parser/parsed_data/create_scalar_function_info.hpp"
 
 #include <math.h>
 #include <climits>