diff --git a/libs/vkd3d-shader/glsl.c b/libs/vkd3d-shader/glsl.c
index 466493ef..ac132e89 100644
--- a/libs/vkd3d-shader/glsl.c
+++ b/libs/vkd3d-shader/glsl.c
@@ -60,6 +60,7 @@ static void vkd3d_glsl_handle_instruction(struct vkd3d_glsl_generator *generator
     switch (instruction->handler_idx)
     {
         case VKD3DSIH_DCL_INPUT:
+        case VKD3DSIH_DCL_OUTPUT_SIV:
             break;
         default:
             vkd3d_glsl_compiler_error(generator,