diff --git a/var/spack/repos/builtin/packages/json-c/package.py b/var/spack/repos/builtin/packages/json-c/package.py
index 1f5c6706a93..476d4627a4e 100644
--- a/var/spack/repos/builtin/packages/json-c/package.py
+++ b/var/spack/repos/builtin/packages/json-c/package.py
@@ -47,3 +47,9 @@ def patch(self):
         filter_file('-Werror',
                     '',
                     'CMakeLists.txt')
+
+    @run_after('install')
+    def darwin_fix(self):
+        # The shared library is not installed correctly on Darwin; fix this
+        if 'platform=darwin' in self.spec:
+            fix_darwin_install_name(self.prefix.lib)