Index: b/sshconnect.c
===================================================================
--- a/sshconnect.c
+++ b/sshconnect.c
@@ -139,7 +139,7 @@
 
 		/* Execute the proxy command.  Note that we gave up any
 		   extra privileges above. */
-		execv(argv[0], argv);
+		execvp(argv[0], argv);
 		perror(argv[0]);
 		exit(1);
 	}
@@ -1167,7 +1167,7 @@
 	pid = fork();
 	if (pid == 0) {
 		debug3("Executing %s -c \"%s\"", shell, args);
-		execl(shell, shell, "-c", args, (char *)NULL);
+		execlp(shell, shell, "-c", args, (char *)NULL);
 		error("Couldn't execute %s -c \"%s\": %s",
 		    shell, args, strerror(errno));
 		_exit(1);