diff --git a/src/corelib/configure.json b/src/corelib/configure.json
index de8d26a12b2..4de6cc19f31 100644
--- a/src/corelib/configure.json
+++ b/src/corelib/configure.json
@@ -343,7 +343,8 @@
                     "# Block futimens() on Apple platforms unless it's available on ALL",
                     "# deployment targets. This simplifies the logic at the call site",
                     "# dramatically, as it isn't strictly needed compared to futimes().",
-                    "darwin: QMAKE_CXXFLAGS += -Werror=unguarded-availability"
+                    "darwin: QMAKE_CXXFLAGS += -Werror=unguarded-availability -Werror=unguarded-availability-new",
+                    "CONFIG += warn_on"
                 ]
             }
         },