diff --git a/dlls/wined3d/glsl_shader.c b/dlls/wined3d/glsl_shader.c
index 7983aeddcec..4b5d36884f5 100644
--- a/dlls/wined3d/glsl_shader.c
+++ b/dlls/wined3d/glsl_shader.c
@@ -5659,7 +5659,7 @@ static void shader_glsl_store_uav(const struct wined3d_shader_instruction *ins)
         return;
     }
     data_type = reg_maps->uav_resource_info[uav_idx].data_type;
-    coord_mask = (1u << resource_type_info[resource_type].coord_size) - 1;
+    coord_mask = wined3d_mask_from_size(resource_type_info[resource_type].coord_size);
 
     shader_glsl_add_src_param(ins, &ins->src[0], coord_mask, &image_coord_param);
     shader_glsl_add_src_param_ext(ins->ctx, &ins->src[1], WINED3DSP_WRITEMASK_ALL, &image_data_param, data_type);