diff --git a/var/spack/repos/builtin/packages/gnutls/package.py b/var/spack/repos/builtin/packages/gnutls/package.py
index 514182377e7b91382867e4ba681ffe3777e1fcea..86830ff3b404ff3fa69d5f947b0474c8139712b4 100644
--- a/var/spack/repos/builtin/packages/gnutls/package.py
+++ b/var/spack/repos/builtin/packages/gnutls/package.py
@@ -27,7 +27,10 @@ class Gnutls(AutotoolsPackage):
     version('3.3.9',  'ff61b77e39d09f1140ab5a9cf52c58b6')
 
     variant('zlib', default=True, description='Enable zlib compression support')
-    variant('guile', default=True, description='Enable Guile bindings')
+    variant('guile', default=False, description='Enable Guile bindings')
+
+    # gnutls+guile is currently broken on MacOS.  See Issue #11668
+    conflicts('+guile', when='platform=darwin')
 
     # Note that version 3.3.9 of gnutls doesn't support nettle 3.0.
     depends_on('nettle@3.4.1:', when='@3.6.7.1:')