diff --git a/iostream/ostream.h b/iostream/ostream.h
index e313ccf..9ac8c24 100644
--- a/iostream/ostream.h
+++ b/iostream/ostream.h
@@ -290,6 +290,7 @@ class ostream : public virtual ios {
   void putNum(int64_t n);
   void putNum(uint32_t n) { putNum(n, false); }
   void putNum(uint64_t n) { putNum(n, false); }
+  void putNum(uintptr_t n) { putNum(n, false); }
   void putPgm(const char *str);
   void putStr(const char *str);