diff --git a/signal.c b/signal.c
index 8873c74..cc1d511 100644
--- a/signal.c
+++ b/signal.c
@@ -994,6 +994,8 @@
 	}
 #elif defined(X86_64)
 	/* no need to remind */
+#elif defined(XTENSA)
+	/* Xtensa only has rt_sys_sigreturn */
 #else
 # warning No sys_sigreturn() for this architecture
 # warning         (no problem, just a reminder :-)