diff --git a/apps/buffering.h b/apps/buffering.h
index bd1ec24374..25427347f5 100644
--- a/apps/buffering.h
+++ b/apps/buffering.h
@@ -65,7 +65,7 @@ bool buffering_reset(char *buf, size_t buflen);
  * amount of data is ready (unless EOF is reached).
  ****************************************************************************/
 
-#define BUF_HANDLE_ID_MASK      0x7FFF
+#define BUF_HANDLE_ID_MASK      0x7FFFFFFF
 #define BUF_MAX_HANDLES         256
 
 int bufopen(const char *file, size_t offset, enum data_type type);