diff --git a/lib/linux/_getcwd.c b/lib/linux/_getcwd.c
index 55db9a02..699edb3b 100644
--- a/lib/linux/_getcwd.c
+++ b/lib/linux/_getcwd.c
@@ -25,7 +25,7 @@
 char *
 _getcwd (char *buffer, size_t size)
 {
-  int r = _sys_call2 (SYS_getcwd, (long) buffer, (long) size);
+  int r = _sys_call2 (SYS_getcwd, buffer, size);
   if (r >= 0)
     return buffer;
   return 0;