diff --git a/bin/tests/system/start.pl b/bin/tests/system/start.pl
index 67c33b86f2..ebbeb687bf 100755
--- a/bin/tests/system/start.pl
+++ b/bin/tests/system/start.pl
@@ -234,7 +234,7 @@ sub construct_ns_command {
 		$command = "taskset $taskset $NAMED ";
 	} elsif ($ENV{'USE_RR'}) {
 		$ENV{'_RR_TRACE_DIR'} = ".";
-		$command = "rr record --chaos $NAMED ";
+		$command = "$ENV{'TOP_BUILDDIR'}/libtool --mode=execute rr record --chaos $NAMED ";
 	} else {
 		$command = "$NAMED ";
 	}