diff --git a/CMakeLists.txt b/CMakeLists.txt
index bbbef26..eb4f8b3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -43,7 +43,7 @@ else (MSVC)
     set(CPPCHECK_ARG_TEMPLATE   "--template=gcc")
     if (CMAKE_COMPILER_IS_GNUCXX)
         # GCC flags
-        add_definitions(-rdynamic -fstack-protector-all -Wall -Wextra -pedantic -Wformat-security -Winit-self -Wswitch-default -Wswitch-enum -Wfloat-equal -Wshadow -Wcast-qual -Wconversion -Wlogical-op -Winline -Wsuggest-attribute=pure -Wsuggest-attribute=const)
+        add_definitions(-rdynamic -fstack-protector-all -Wall -Wextra -pedantic -Wformat-security -Winit-self -Wswitch-default -Wswitch-enum -Wfloat-equal -Wshadow -Wcast-qual -Wconversion -Wlogical-op -Winline)
     elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
         # Clang flags
         add_definitions(-fstack-protector-all -Wall -Wextra -pedantic -Wformat-security -Winit-self -Wswitch-default -Wswitch-enum -Wfloat-equal -Wshadow -Wcast-qual -Wconversion -Winline)