diff --git a/sys/dev/aic7xxx/aicasm/aicasm.c b/sys/dev/aic7xxx/aicasm/aicasm.c
index 5f2fbaa8b64..886c29a290a 100644
--- a/sys/dev/aic7xxx/aicasm/aicasm.c
+++ b/sys/dev/aic7xxx/aicasm/aicasm.c
@@ -75,7 +75,7 @@ typedef struct patch {
 
 STAILQ_HEAD(patch_list, patch) patches;
 
-static void usage(void);
+static void usage(void) __dead2;
 static void back_patch(void);
 static void output_code(void);
 static void output_listing(char *ifilename);