diff --git a/sigma/sigma_cpu.c b/sigma/sigma_cpu.c
index 87903d96..be5779eb 100644
--- a/sigma/sigma_cpu.c
+++ b/sigma/sigma_cpu.c
@@ -2676,7 +2676,7 @@ for (i = 0; i < RF_NUM; i++, rptr++)
 return;
 }
 
-/* Front panael alarm */
+/* Front panel alarm */
 
 t_stat cpu_set_alarm (UNIT *uptr, int32 val, CONST char *cptr, void *desc)
 {