diff --git a/pdb/enums-external.pl b/pdb/enums-external.pl
index de7ef877fd..169031b42b 100644
--- a/pdb/enums-external.pl
+++ b/pdb/enums-external.pl
@@ -1,5 +1,6 @@
     GeglDistanceMetric =>
 	{ contig => 1,
+	  header => '',
 	  external => 1,
 	  symbols => [ qw(GEGL_DISTANCE_METRIC_EUCLIDEAN
 			  GEGL_DISTANCE_METRIC_MANHATTAN