diff --git a/cmd/cmount/mount_test.go b/cmd/cmount/mount_test.go
index 571913954..ca97f7f28 100644
--- a/cmd/cmount/mount_test.go
+++ b/cmd/cmount/mount_test.go
@@ -1,6 +1,10 @@
 // +build cmount
 // +build cgo
 // +build linux darwin freebsd windows
+// +build !race !windows
+
+// FIXME this doesn't work with the race detector under Windows either
+// hanging or producing lots of differences.
 
 package cmount