diff --git a/ps/output.c b/ps/output.c
index d99be099..24f7e5e9 100644
--- a/ps/output.c
+++ b/ps/output.c
@@ -609,10 +609,13 @@ static int pr_class(char *restrict const outbuf, const proc_t *restrict const pp
   case  0: return snprintf(outbuf, COLWID, "TS");  // SCHED_OTHER
   case  1: return snprintf(outbuf, COLWID, "FF");  // SCHED_FIFO
   case  2: return snprintf(outbuf, COLWID, "RR");  // SCHED_RR
-  case  3: return snprintf(outbuf, COLWID, "B");   // SCHED_BATCH? (will be "B")
+  case  3: return snprintf(outbuf, COLWID, "B");   // SCHED_BATCH
   case  4: return snprintf(outbuf, COLWID, "#4");  // SCHED_ISO? (Con Kolivas)
-  case  5: return snprintf(outbuf, COLWID, "#5");  //
+  case  5: return snprintf(outbuf, COLWID, "#5");  // SCHED_IDLEPRIO? (Con Kolivas)
+  case  8: return snprintf(outbuf, COLWID, "#6");  //
+  case  8: return snprintf(outbuf, COLWID, "#7");  //
   case  8: return snprintf(outbuf, COLWID, "#8");  //
+  case  8: return snprintf(outbuf, COLWID, "#9");  //
   default: return snprintf(outbuf, COLWID, "?");   // unknown value
   }
 }