diff --git a/var/spack/repos/builtin/packages/glib/package.py b/var/spack/repos/builtin/packages/glib/package.py
index e8b92020bdc..342a61a6a1b 100644
--- a/var/spack/repos/builtin/packages/glib/package.py
+++ b/var/spack/repos/builtin/packages/glib/package.py
@@ -41,6 +41,7 @@ class Glib(Package):
     depends_on("pkg-config")
     depends_on('gettext', sys.platform == 'darwin')
 
+    # The following patch is needed for gcc-6.1
     patch('g_date_strftime.patch')
 
     def install(self, spec, prefix):