diff --git a/src/gallium/drivers/radeonsi/si_shader.h b/src/gallium/drivers/radeonsi/si_shader.h
index 803045d888c..9a89be7932f 100644
--- a/src/gallium/drivers/radeonsi/si_shader.h
+++ b/src/gallium/drivers/radeonsi/si_shader.h
@@ -558,9 +558,9 @@ struct si_shader_key {
 			unsigned	vs_export_prim_id:1;
 			struct {
 				unsigned interpolate_at_sample_force_center:1;
-				unsigned fbfetch_msaa;
-				unsigned fbfetch_is_1D;
-				unsigned fbfetch_layered;
+				unsigned fbfetch_msaa:1;
+				unsigned fbfetch_is_1D:1;
+				unsigned fbfetch_layered:1;
 			} ps;
 		} u;
 	} mono;