diff --git a/fs/nfs/Makefile b/fs/nfs/Makefile
index 1e987ac..8664417 100644
--- a/fs/nfs/Makefile
+++ b/fs/nfs/Makefile
@@ -22,7 +22,7 @@
 obj-$(CONFIG_NFS_V4) += nfsv4.o
 CFLAGS_nfs4trace.o += -I$(src)
 nfsv4-y := nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o nfs4super.o nfs4file.o \
-	  delegation.o idmap.o callback.o callback_xdr.o callback_proc.o \
+	  delegation.o nfs4idmap.o callback.o callback_xdr.o callback_proc.o \
 	  nfs4namespace.o nfs4getroot.o nfs4client.o nfs4session.o \
 	  dns_resolve.o nfs4trace.o
 nfsv4-$(CONFIG_NFS_USE_LEGACY_DNS) += cache_lib.o
diff --git a/fs/nfs/idmap.c b/fs/nfs/nfs4idmap.c
similarity index 100%
rename from fs/nfs/idmap.c
rename to fs/nfs/nfs4idmap.c