Index: src/Concurrency/Waitfor.cc
===================================================================
--- src/Concurrency/Waitfor.cc	(revision 09f34a84d91d0f6c3dcd80079886a3a4dd8e7ec7)
+++ src/Concurrency/Waitfor.cc	(revision ae1d15124ce32b2a9afb229d30e293e49dd1577b)
@@ -402,5 +402,5 @@
 
 		clause.target.function = nullptr;
-		clause.target.arguments.empty();
+		clause.target.arguments.clear();
 		clause.condition = nullptr;
 	}