--- rpl/modules/sets/sets.rplc	2017/07/03 11:47:04	1.3
+++ rpl/modules/sets/sets.rplc	2017/07/03 12:15:30	1.4
@@ -17,6 +17,9 @@ declareSubroutine(onClosing)
 	notice(stdout, "Sets library unloaded.\n\n");
 endSubroutine
 
-exportExternalFunctions(intersection, union);
+exportExternalFunctions(
+		complement,
+		intersection,
+		union);
 
 // vim: ts=4