diff --git a/src/gallium/drivers/zink/zink_shader_keys.h b/src/gallium/drivers/zink/zink_shader_keys.h
index 924467b6eda..ccc160f0d2d 100644
--- a/src/gallium/drivers/zink/zink_shader_keys.h
+++ b/src/gallium/drivers/zink/zink_shader_keys.h
@@ -150,6 +150,16 @@ union zink_shader_key_optimal {
 
 /* the default key has only last_vertex_stage set*/
 #define ZINK_SHADER_KEY_OPTIMAL_DEFAULT (1<<0)
+/* Ignore patch_vertices bits that would only be used if we had to generate the missing TCS */
+static inline uint32_t
+zink_shader_key_optimal_no_tcs(uint32_t key)
+{
+   union zink_shader_key_optimal k;
+   k.val = key;
+   k.tcs_bits = 0;
+   return k.val;
+}
+#define ZINK_SHADER_KEY_OPTIMAL_IS_DEFAULT(key) (zink_shader_key_optimal_no_tcs(key) == ZINK_SHADER_KEY_OPTIMAL_DEFAULT)
 
 static inline const struct zink_fs_key_base *
 zink_fs_key_base(const struct zink_shader_key *key)