diff --git a/gnu/packages/datastructures.scm b/gnu/packages/datastructures.scm
index f247231ecf..4fa38ee3d4 100644
--- a/gnu/packages/datastructures.scm
+++ b/gnu/packages/datastructures.scm
@@ -155,7 +155,7 @@ (define-public liburcu
 with the number of cores.  liburcu-cds provides efficient data structures
 based on RCU and lock-free algorithms.  These structures include hash tables,
 queues, stacks, and doubly-linked lists.")
-    (license license:lgpl2.1+)))
+    (license (list license:lgpl2.1 license:expat))))
 
 (define-public uthash
   (package