diff --git a/snmp/zfs-linux b/snmp/zfs-linux
index e9c19e1..c5f3625 100644
--- a/snmp/zfs-linux
+++ b/snmp/zfs-linux
@@ -73,7 +73,7 @@ def main(args):
     CACHE_HIT_PERCENT = ARC_HITS / ARC_ACCESSES_TOTAL * 100
     CACHE_MISS_PERCENT = ARC_MISSES / ARC_ACCESSES_TOTAL * 100
     ACTUAL_HIT_PERCENT = REAL_HITS / ARC_ACCESSES_TOTAL * 100
-    DATA_DEMAND_PERCENT = DEMAND_DATA_HITS / DEMAND_DATA_TOTAL * 100
+    DATA_DEMAND_PERCENT = DEMAND_DATA_HITS / DEMAND_DATA_TOTAL * 100 if DEMAND_DATA_TOTAL != 0 else 0
 
     DATA_PREFETCH_PERCENT = PREFETCH_DATA_HITS / PREFETCH_DATA_TOTAL * 100 if PREFETCH_DATA_TOTAL != 0 else 0