diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 3a6298669c3..47c06d89eff 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -186,6 +186,7 @@ enum pipe_tex_reduction_mode {
  */
 enum pipe_map_flags
 {
+   PIPE_MAP_NONE = 0,
    /**
     * Resource contents read back (or accessed directly) at transfer
     * create time.