diff --git a/CMakeLists.txt b/CMakeLists.txt
index 096320b1b8..484652d99b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -82,7 +82,6 @@ find_package(Threads)
 
 if(UNIX)
     add_compile_options(-Wall -Wpedantic -Wextra -Wno-unused-parameter)
-    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Ofast")
 endif()
 
 if(APPLE)