diff --git a/CMakeLists.txt b/CMakeLists.txt
index eab4984..1fdb977 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,7 +31,7 @@ if((${CMAKE_CXX_COMPILER_ID} STREQUAL GNU) OR (${CMAKE_CXX_COMPILER_ID} STREQUAL
     set(CMAKE_CXX_FLAGS "-flto ${CMAKE_CXX_FLAGS} -fpie -pipe -fstack-protector-strong -fstack-clash-protection")
     include(CheckCXXCompilerFlag)
     CHECK_CXX_COMPILER_FLAG("-fcf-protection" CF_PROTECTION_SUPPORTED)
-    if (${CF_PROTECTION_SUPPORTED})
+    if (CF_PROTECTION_SUPPORTED)
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fcf-protection")
     endif()
 endif()