diff --git a/CMakeLists.txt b/CMakeLists.txt
index cc13916c54..7c551951e4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -335,7 +335,7 @@ else ()
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DDEBUG=${DEBUG_LEVEL}")
 
     # Enable char8_t<->char conversion :(
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-char8_t")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-char8_t -Wno-deprecated-declarations")
 
     if(APPLE)
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-error=objc-method-access")