--- a/ee.c
+++ b/ee.c
@@ -552,7 +552,7 @@
 {
 	int counter;
 
-	for (counter = 1; counter < SIGUNUSED; counter++)
+	for (counter = 1; counter < SIGSYS; counter++)
 		signal(counter, SIG_IGN);
 
 	signal(SIGCHLD, SIG_DFL);