diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y
index a0269239..ba617346 100644
--- a/libs/vkd3d-shader/hlsl.y
+++ b/libs/vkd3d-shader/hlsl.y
@@ -6856,6 +6856,8 @@ parameter:
                 }
                 type = hlsl_new_array_type(ctx, type, $4.sizes[i]);
             }
+            vkd3d_free($4.sizes);
+
             $$.type = type;
 
             if (hlsl_version_ge(ctx, 5, 1) && type->class == HLSL_CLASS_ARRAY && hlsl_type_is_resource(type))