diff --git a/symbolic-demangle/build.rs b/symbolic-demangle/build.rs
index 75344b2c..79af4691 100644
--- a/symbolic-demangle/build.rs
+++ b/symbolic-demangle/build.rs
@@ -18,7 +18,7 @@ fn main() {
                 "vendor/swift/lib/Demangling/Remangler.cpp",
             ])
             .flag_if_supported("-std=c++17")
-            .flag_if_supported("-mmacosx-version-min=11.0.0")
+            .flag_if_supported("-fpermissive")
             .flag_if_supported("-Wno-changes-meaning")
             .flag("-DLLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING=1")
             .flag("-DSWIFT_STDLIB_HAS_TYPE_PRINTING=1")