diff --git a/proc.c b/proc.c
index 3a19d92..96f96d9 100644
--- a/proc.c
+++ b/proc.c
@@ -437,7 +437,7 @@ procdump(void)
     p = &proc[i];
     if(p->state == UNUSED)
       continue;
-    if(p->state >= 0 && p->state < NELEM(states))
+    if(p->state >= 0 && p->state < NELEM(states) && states[p->state])
       state = states[p->state];
     else
       state = "???";