diff --git a/sys/modules/qlxgbe/Makefile b/sys/modules/qlxgbe/Makefile
index d94b08e50885..1ecb96f7638e 100644
--- a/sys/modules/qlxgbe/Makefile
+++ b/sys/modules/qlxgbe/Makefile
@@ -43,6 +43,9 @@ SRCS+= ql_minidump.c
 
 SRCS+= device_if.h bus_if.h pci_if.h
 
+# Uses unnamed structure and union fields
+CFLAGS+= ${GCC_MS_EXTENSIONS}
+
 #CFLAGS += -DQL_DBG
 # Please turn off QL_LDFLASH_FW when you enable QL_ENABLE_ISCSI_TLV
 # You may comment out both QL_LDFLASH_FW and QL_ENABLE_ISCSI_TLV if you like