diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4310301..c582660 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -157,8 +157,8 @@ if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
 	set(CMAKE_C_FLAGS_DEBUG "-g -D_DEBUG -O1")
 	set(CMAKE_C_FLAGS_DEBUGALL "-g -ggdb -D_DEBUG")
 	set(CMAKE_C_FLAGS_PROFILE "-g -ggdb -D_DEBUG -O1 -fno-omit-frame-pointer")
-	set(CMAKE_C_FLAGS_RELEASE "-O3 -ffast-math -fno-unsafe-math-optimizations -fomit-frame-pointer")
-	set(CMAKE_C_FLAGS_RELWITHDEBINFO "-g -O3 -ffast-math -fno-unsafe-math-optimizations -fomit-frame-pointer")
+	set(CMAKE_C_FLAGS_RELEASE "-O2 -ffast-math -fno-unsafe-math-optimizations -fomit-frame-pointer")
+	set(CMAKE_C_FLAGS_RELWITHDEBINFO "-g -O2 -ffast-math -fno-unsafe-math-optimizations -fomit-frame-pointer")
 	set(CMAKE_C_FLAGS_MINSIZEREL "-Os -ffast-math -fno-unsafe-math-optimizations -fomit-frame-pointer")
 
 	set(CMAKE_CXX_FLAGS_DEBUGALL ${CMAKE_C_FLAGS_DEBUGALL})