diff --git a/src/smbiosmdrv2handler.cpp b/src/smbiosmdrv2handler.cpp
index 058c3ee..ea4a794 100644
--- a/src/smbiosmdrv2handler.cpp
+++ b/src/smbiosmdrv2handler.cpp
@@ -194,7 +194,7 @@
 
 bool MDRV2::smbiosIsUpdating(uint8_t index)
 {
-    if (index > maxDirEntries)
+    if (index >= maxDirEntries)
     {
         return false;
     }