diff --git a/include/linux/kmod.h b/include/linux/kmod.h
index 0db22a1..10f505c 100644
--- a/include/linux/kmod.h
+++ b/include/linux/kmod.h
@@ -47,4 +47,8 @@
 
 extern void usermodehelper_init(void);
 
+struct file;
+extern int call_usermodehelper_pipe(char *path, char *argv[], char *envp[],
+				    struct file **filp);
+
 #endif /* __LINUX_KMOD_H__ */