diff --git a/lib/librte_eal/linuxapp/kni/ethtool/igb/igb.h b/lib/librte_eal/linuxapp/kni/ethtool/igb/igb.h
index d077b49e9..8667f29ca 100644
--- a/lib/librte_eal/linuxapp/kni/ethtool/igb/igb.h
+++ b/lib/librte_eal/linuxapp/kni/ethtool/igb/igb.h
@@ -607,7 +607,7 @@  struct igb_adapter {
 	int int_mode;
 	u32 rss_queues;
 	u32 vmdq_pools;
-	char fw_version[32];
+	char fw_version[43];
 	u32 wvbr;
 	struct igb_mac_addr *mac_table;
 #ifdef CONFIG_IGB_VMDQ_NETDEV