diff --git a/CMakeLists.txt b/CMakeLists.txt
index f6b297b5a..6041840d6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -239,7 +239,7 @@ set(CMAKE_MACOSX_RPATH 1)
 set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_RPATH};${CMAKE_INSTALL_FULL_LIBDIR}/icinga2")
 
 if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-  set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -Winconsistent-missing-override")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Winconsistent-missing-override")
 
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Qunused-arguments -fcolor-diagnostics -fno-limit-debug-info")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Qunused-arguments -fcolor-diagnostics -fno-limit-debug-info")
@@ -258,7 +258,7 @@ if(CMAKE_C_COMPILER_ID STREQUAL "SunPro")
 endif()
 
 if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
-  set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} -Wsuggest-override")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wsuggest-override")
 
   if(CMAKE_SYSTEM_NAME MATCHES AIX)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -lpthread")