diff --git a/libs/vkd3d-shader/ir.c b/libs/vkd3d-shader/ir.c
index e5841c6e..af6f8573 100644
--- a/libs/vkd3d-shader/ir.c
+++ b/libs/vkd3d-shader/ir.c
@@ -6788,6 +6788,7 @@ sysval_validation_data[] =
             VKD3D_SHADER_COMPONENT_FLOAT, 4},
     [VKD3D_SHADER_SV_TESS_FACTOR_QUADEDGE] = {0, 0, HS_BIT | DS_BIT, VKD3D_SHADER_COMPONENT_FLOAT, 1},
     [VKD3D_SHADER_SV_TESS_FACTOR_QUADINT] = {0, 0, HS_BIT | DS_BIT, VKD3D_SHADER_COMPONENT_FLOAT, 1},
+    [VKD3D_SHADER_SV_TESS_FACTOR_TRIEDGE] = {0, 0, HS_BIT | DS_BIT, VKD3D_SHADER_COMPONENT_FLOAT, 1},
 };
 
 static void vsir_validate_signature_element(struct validation_context *ctx,