diff --git a/epan/wslua/lrexlib/CMakeLists.txt b/epan/wslua/lrexlib/CMakeLists.txt
index f51fbfc86d..4d4b44d46c 100644
--- a/epan/wslua/lrexlib/CMakeLists.txt
+++ b/epan/wslua/lrexlib/CMakeLists.txt
@@ -13,7 +13,7 @@ target_link_libraries(lrexlib PRIVATE
 )
 
 target_include_directories(lrexlib SYSTEM PRIVATE
-	${CMAKE_SOURCE_DIR}
+	${CMAKE_BINARY_DIR}
 	${CMAKE_SOURCE_DIR}/epan
 	${LUA_INCLUDE_DIRS}
 	${PCRE2_INCLUDE_DIRS}