diff --git a/src/afs/HPUX/osi_vfsops.c b/src/afs/HPUX/osi_vfsops.c
index 5d53926ba2..6383d5345c 100644
--- a/src/afs/HPUX/osi_vfsops.c
+++ b/src/afs/HPUX/osi_vfsops.c
@@ -166,7 +166,7 @@ afs_statfs(struct vfs *afsp, struct k_statvfs *abp)
      */
     abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
 	abp->f_ffree = abp->f_favail = AFS_VFS_FAKEFREE;
-    abp->f_fsid = (AFS_VFSMAGIC << 16) || AFS_VFSFSID;
+    abp->f_fsid = (AFS_VFSMAGIC << 16) | AFS_VFSFSID;
 
     AFS_GUNLOCK();
     return 0;
diff --git a/src/afs/SOLARIS/osi_vfsops.c b/src/afs/SOLARIS/osi_vfsops.c
index 71002ec0c5..1f03b8f3d3 100644
--- a/src/afs/SOLARIS/osi_vfsops.c
+++ b/src/afs/SOLARIS/osi_vfsops.c
@@ -229,7 +229,7 @@ afs_statvfs(struct vfs *afsp, struct statvfs64 *abp)
     abp->f_bsize = afsp->vfs_bsize;
     abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
 	abp->f_favail = abp->f_ffree = AFS_VFS_FAKEFREE;
-    abp->f_fsid = (AFS_VFSMAGIC << 16) || AFS_VFSFSID;
+    abp->f_fsid = (AFS_VFSMAGIC << 16) | AFS_VFSFSID;
 
     AFS_GUNLOCK();
     return 0;
diff --git a/src/afs/UKERNEL/osi_vfsops.c b/src/afs/UKERNEL/osi_vfsops.c
index 2dfa201d05..38b1e72ec8 100644
--- a/src/afs/UKERNEL/osi_vfsops.c
+++ b/src/afs/UKERNEL/osi_vfsops.c
@@ -129,7 +129,7 @@ afs_statvfs(struct vfs *afsp, struct statvfs *abp)
     abp->f_fsid.val[0] = AFS_VFSMAGIC;
     abp->f_fsid.val[1] = AFS_VFSFSID;
 #else
-    abp->f_fsid = (AFS_VFSMAGIC << 16) || AFS_VFSFSID;
+    abp->f_fsid = (AFS_VFSMAGIC << 16) | AFS_VFSFSID;
 #endif
 
     return 0;