diff --git a/src/gallium/include/pipe/p_state.h b/src/gallium/include/pipe/p_state.h
index 7acb79df67c..1d907bd228d 100644
--- a/src/gallium/include/pipe/p_state.h
+++ b/src/gallium/include/pipe/p_state.h
@@ -213,10 +213,10 @@ struct pipe_viewport_state
 {
    float scale[3];
    float translate[3];
-   enum pipe_viewport_swizzle swizzle_x:3;
-   enum pipe_viewport_swizzle swizzle_y:3;
-   enum pipe_viewport_swizzle swizzle_z:3;
-   enum pipe_viewport_swizzle swizzle_w:3;
+   enum pipe_viewport_swizzle swizzle_x:8;
+   enum pipe_viewport_swizzle swizzle_y:8;
+   enum pipe_viewport_swizzle swizzle_z:8;
+   enum pipe_viewport_swizzle swizzle_w:8;
 };