diff --git a/Formula/guile.rb b/Formula/guile.rb
index e79eab868a..8b50bae545 100644
--- a/Formula/guile.rb
+++ b/Formula/guile.rb
@@ -29,6 +29,10 @@ class Guile < Formula
   depends_on "readline"
 
   def install
+    # Work around Xcode 11 clang bug
+    # https://bitbucket.org/multicoreware/x265/issues/514/wrong-code-generated-on-macos-1015
+    ENV.append_to_cflags "-fno-stack-check" if DevelopmentTools.clang_build_version >= 1010
+
     system "./autogen.sh" unless build.stable?
     system "./configure", "--disable-dependency-tracking",
                           "--prefix=#{prefix}",