diff --git a/modules/src/system/seek.c b/modules/src/system/seek.c
index 97749ae12..ba52b845d 100644
--- a/modules/src/system/seek.c
+++ b/modules/src/system/seek.c
@@ -8,10 +8,7 @@
 #include "system.h"
 
 int
-sys_seek(fp, off, whence, poff)
-	File *fp;
-	long off;
-	long *poff;
+sys_seek(File* fp, long off, int whence, long* poff)
 {
 	if (! fp) return 0;
 	return (*poff = lseek(fp->o_fd, off, whence)) >= 0;