diff --git a/CMakeLists.txt b/CMakeLists.txt
index e9ca3d8..6ee1e9d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -59,7 +59,6 @@ IF(LSQUIC_FIU)
 ENDIF()
 
 IF(CMAKE_BUILD_TYPE STREQUAL "Debug")
-    SET(MY_CMAKE_FLAGS "${MY_CMAKE_FLAGS} -O0 -g3")
     IF(CMAKE_C_COMPILER MATCHES "clang" AND
                         NOT "$ENV{TRAVIS}" MATCHES "^true$" AND
                         NOT "$ENV{EXTRA_CFLAGS}" MATCHES "-fsanitize")
@@ -69,7 +68,6 @@ IF(CMAKE_BUILD_TYPE STREQUAL "Debug")
     # Uncomment to enable cleartext protocol mode (no crypto):
     #SET (MY_CMAKE_FLAGS "${MY_CMAKE_FLAGS} -DLSQUIC_ENABLE_HANDSHAKE_DISABLE=1")
 ELSE()
-    SET(MY_CMAKE_FLAGS "${MY_CMAKE_FLAGS} -O3 -g0")
     # Comment out the following line to compile out debug messages:
     #SET(MY_CMAKE_FLAGS "${MY_CMAKE_FLAGS} -DLSQUIC_LOWEST_LOG_LEVEL=LSQ_LOG_INFO")
 ENDIF()