diff --git a/magic/Magdir/filesystems b/magic/Magdir/filesystems
index 8d60f69..50dae60 100644
--- a/magic/Magdir/filesystems
+++ b/magic/Magdir/filesystems
@@ -1468,9 +1468,13 @@
 
 # From Eric Sandeen
 # GFS2
-0x10000         belong          0x01161970      GFS2 Filesystem
->0x10024        belong          x               (blocksize %d,
->0x10060        string          >\0             lockproto %s)
+0x10000         belong          0x01161970
+>0x10018        belong          0x0000051d      GFS1 Filesystem
+>>0x10024        belong          x               (blocksize %d,
+>>0x10060        string          >\0             lockproto %s)
+>0x10018        belong          0x00000709      GFS2 Filesystem
+>>0x10024        belong          x               (blocksize %d,
+>>0x10060        string          >\0             lockproto %s)
 
 # BTRFS
 0x10040         string          _BHRfS_M        BTRFS Filesystem