diff --git a/code/lkm.c b/code/lkm.c
index af80f82fd..ed5e11770 100644
--- a/code/lkm.c
+++ b/code/lkm.c
@@ -7,7 +7,7 @@
 #define DEVICE_NAME "lkm"
 
 static int lkm_init(void);
-static int lkm_exit(void);
+static void lkm_exit(void);
 int lkm_open(struct inode *, struct file *);
 int lkm_release(struct inode *, struct file *);
 long lkm_ioctl(struct file *, unsigned int, long unsigned int);