diff --git a/CMakeLists.txt b/CMakeLists.txt
index e277441fa..f4c59c042 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -229,8 +229,8 @@ ENDIF()
 IF ( IOS )
 
 IF (CMAKE_BUILD_TYPE STREQUAL "Debug")
-  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fembed-bitcode -g")
-  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fembed-bitcode -g")
+  SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fembed-bitcode -Og")
+  SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fembed-bitcode -Og")
 ELSE()
   SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fembed-bitcode -O3")
   SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fembed-bitcode -O3")