diff --git a/fs/nfs/nfs4session.h b/fs/nfs/nfs4session.h
index 230509b77121..b996ee23f1ba 100644
--- a/fs/nfs/nfs4session.h
+++ b/fs/nfs/nfs4session.h
@@ -10,7 +10,7 @@
 
 /* maximum number of slots to use */
 #define NFS4_DEF_SLOT_TABLE_SIZE (64U)
-#define NFS4_DEF_CB_SLOT_TABLE_SIZE (1U)
+#define NFS4_DEF_CB_SLOT_TABLE_SIZE (16U)
 #define NFS4_MAX_SLOT_TABLE (1024U)
 #define NFS4_NO_SLOT ((u32)-1)