--- scp.c
+++ scp.c
@@ -112,8 +112,10 @@
 static void
 killchild(int signo)
 {
-	if (do_cmd_pid > 1)
+	if (do_cmd_pid > 1) {
 		kill(do_cmd_pid, signo);
+		waitpid(do_cmd_pid, NULL, 0);
+	}
 
 	_exit(1);
 }
--- sftp.c
+++ sftp.c
@@ -144,9 +144,10 @@
 static void
 killchild(int signo)
 {
-	if (sshpid > 1)
+	if (sshpid > 1) {
 		kill(sshpid, SIGTERM);
-
+		waitpid(sshpid, NULL, 0);
+	}
 	_exit(1);
 }