--- ssh-agent.c
+++ ssh-agent.c
@@ -1159,8 +1159,18 @@
 	parent_pid = getpid();
 
 	if (agentsocket == NULL) {
+		char *tmp1, *tmp;
+		char *tmp2 = "ssh-XXXXXXXXXX";
+		size_t len;
+
+		if ((tmp1 = getenv("TMPDIR")) == NULL)
+			tmp1 = "/tmp";
+		len = strlen(tmp1) + strlen(tmp2) + 1;
+		tmp = malloc(len);
+		snprintf(tmp, len, "%s%s%s", tmp1, tmp1 && strlen(tmp1) > 0 ? "/" : "", tmp2);
 		/* Create private directory for agent socket */
-		strlcpy(socket_dir, "/tmp/ssh-XXXXXXXXXX", sizeof socket_dir);
+		strlcpy(socket_dir, tmp, sizeof socket_dir);
+		free(tmp);
 		if (mkdtemp(socket_dir) == NULL) {
 			perror("mkdtemp: private socket dir");
 			exit(1);