diff --git a/panopoly_core.make b/panopoly_core.make
index d1be9a7..6600c3c 100644
--- a/panopoly_core.make
+++ b/panopoly_core.make
@@ -90,6 +90,7 @@ projects[strongarm][subdir] = contrib
 
 projects[defaultconfig][version] = 1.0-alpha9
 projects[defaultconfig][subdir] = contrib
+projects[defaultconfig][patch][1900574] = http://drupal.org/files/1900574.defaultconfig.undefinedindex_11.patch
 
 projects[defaultcontent][version] = 1.0-alpha9
 projects[defaultcontent][subdir] = contrib