--- vmstat.c
+++ vmstat.c	2009-08-19 12:37:57.000000000 +0000
@@ -184,7 +184,7 @@ static void new_format(void) {
   unsigned int intr[2], ctxt[2];
   unsigned int sleep_half; 
   unsigned long kb_per_page = sysconf(_SC_PAGESIZE) / 1024ul;
-  int debt = 0;  // handle idle ticks running backwards
+  long long debt = 0;  // handle idle ticks running backwards
 
   sleep_half=(sleep_time/2);
   new_header();
@@ -203,6 +203,8 @@ static void new_format(void) {
   dstl= *cpu_zzz;
   Div= duse+dsys+didl+diow+dstl;
   divo2= Div/2UL;
+  if (Div == 0)
+    Div++;
   printf(format,
 	 running, blocked,
 	 unitConvert(kb_swap_used), unitConvert(kb_main_free),
@@ -242,16 +244,18 @@ static void new_format(void) {
 
     /* idle can run backwards for a moment -- kernel "feature" */
     if(debt){
-      didl = (int)didl + debt;
-      debt = 0;
+      didl = (long long)didl + debt;
+      debt = 0LL;
     }
-    if( (int)didl < 0 ){
-      debt = (int)didl;
-      didl = 0;
+    if((long long)didl < 0){
+      debt = (long long)didl;
+      didl = 0ULL;
     }
 
     Div= duse+dsys+didl+diow+dstl;
     divo2= Div/2UL;
+    if (Div == 0)
+      continue;
     printf(format,
            running, blocked,
 	   unitConvert(kb_swap_used),unitConvert(kb_main_free),