diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1252a745..e0d4dacb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,7 +26,7 @@ endif()
 
 
 ###############################################################################
-RAGEL_TARGET(json-flat json/flat.cpp.rl ${CMAKE_CURRENT_BINARY_DIR}/json/flat.cpp)
+RAGEL_TARGET(json-flat json/flat.cpp.rl ${CMAKE_CURRENT_BINARY_DIR}/json/flat.cpp COMPILE_FLAGS -G2)
 RAGEL_TARGET(uri uri.cpp.rl ${CMAKE_CURRENT_BINARY_DIR}/uri.cpp)
 RAGEL_TARGET(version version.cpp.rl ${CMAKE_CURRENT_BINARY_DIR}/version.cpp)