diff --git a/unmount.go b/unmount.go
index e261333..7acec46 100644
--- a/unmount.go
+++ b/unmount.go
@@ -14,6 +14,8 @@
 
 package fuse
 
+import "github.com/jacobsa/fuse/internal/fuseshim"
+
 // Attempt to unmount the file system whose mount point is the supplied
 // directory.
 func Unmount(dir string) error {