diff --git a/lib/util/idtree.h b/lib/util/idtree.h
index e7864a86968..79d2d8cd260 100644
--- a/lib/util/idtree.h
+++ b/lib/util/idtree.h
@@ -50,11 +50,6 @@ int idr_get_new(struct idr_context *idp, void *ptr, int limit);
 */
 int idr_get_new_above(struct idr_context *idp, void *ptr, int starting_id, int limit);
 
-/**
-  allocate a new id randomly in the given range
-*/
-int idr_get_new_random(struct idr_context *idp, void *ptr, int limit);
-
 /**
   find a pointer value previously set with idr_get_new given an id
 */