diff --git a/drivers/zorro/proc.c b/drivers/zorro/proc.c
index 1a409c2c320c800fef3935dd54bbf4d717036e15..7aa2d3de6d37d3378a96378c520c2ac5fef276a2 100644
--- a/drivers/zorro/proc.c
+++ b/drivers/zorro/proc.c
@@ -45,7 +45,7 @@ proc_bus_zorro_lseek(struct file *file, loff_t off, int whence)
 }
 
 static ssize_t
-proc_bus_zorro_read(struct file *file, char *buf, size_t nbytes, loff_t *ppos)
+proc_bus_zorro_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
 {
 	struct inode *ino = file->f_dentry->d_inode;
 	struct proc_dir_entry *dp = PDE(ino);