diff --git a/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.c b/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.c
index 9aa57c44569..ff87ba79531 100644
--- a/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.c
+++ b/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.c
@@ -765,6 +765,20 @@ spirv_builder_emit_demote(struct spirv_builder *b)
    spirv_buffer_emit_word(&b->instructions, SpvOpDemoteToHelperInvocation | (1 << 16));
 }
 
+SpvId
+spirv_is_helper_invocation(struct spirv_builder *b)
+{
+   SpvId result = spirv_builder_new_id(b);
+   SpvId result_type = spirv_builder_type_bool(b);
+
+   int words = 3;
+   spirv_buffer_prepare(&b->instructions, b->mem_ctx, words);
+   spirv_buffer_emit_word(&b->instructions, SpvOpIsHelperInvocationEXT | (words << 16));
+   spirv_buffer_emit_word(&b->instructions, result_type);
+   spirv_buffer_emit_word(&b->instructions, result);
+   return result;
+}
+
 SpvId
 spirv_builder_emit_vote(struct spirv_builder *b, SpvOp op, SpvId src)
 {
diff --git a/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.h b/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.h
index f4515deea5c..c3233a0030d 100644
--- a/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.h
+++ b/src/gallium/drivers/zink/nir_to_spirv/spirv_builder.h
@@ -271,6 +271,9 @@ spirv_builder_emit_kill(struct spirv_builder *b);
 void
 spirv_builder_emit_demote(struct spirv_builder *b);
 
+SpvId
+spirv_is_helper_invocation(struct spirv_builder *b);
+
 SpvId
 spirv_builder_emit_vote(struct spirv_builder *b, SpvOp op, SpvId src);