diff --git a/syscall.c b/syscall.c
index d92074aa..b4b0f1f1 100644
--- a/syscall.c
+++ b/syscall.c
@@ -388,11 +388,6 @@ int do_fstat(int fd, STRUCT_STAT *st)
 OFF_T do_lseek(int fd, OFF_T offset, int whence)
 {
 #ifdef HAVE_LSEEK64
-#if !SIZEOF_OFF64_T
-	OFF_T lseek64();
-#else
-	off64_t lseek64();
-#endif
 	return lseek64(fd, offset, whence);
 #else
 	return lseek(fd, offset, whence);