diff --git a/options_mac.cmake b/options_mac.cmake
index a0fc1c0c..3e872dbe 100644
--- a/options_mac.cmake
+++ b/options_mac.cmake
@@ -28,6 +28,7 @@ INTERFACE
     -Wall
     -W
     -fPIE
+    $<$<COMPILE_LANGUAGE:OBJC,OBJCXX>:-fobjc-weak>
     -Wno-deprecated-declarations # temp for range-v3
     -Wno-unused-variable
     -Wno-unused-parameter