diff --git a/libs/vkd3d-shader/ir.c b/libs/vkd3d-shader/ir.c
index 94ec95d07..f23aa0b1a 100644
--- a/libs/vkd3d-shader/ir.c
+++ b/libs/vkd3d-shader/ir.c
@@ -9631,7 +9631,8 @@ static void vsir_validate_sampler_register(struct validation_context *ctx,
 
     if (reg->data_type != VSIR_DATA_UNUSED)
         validator_error(ctx, VKD3D_SHADER_ERROR_VSIR_INVALID_DATA_TYPE,
-                "Invalid data type %#x for a SAMPLER register.", reg->data_type);
+                "Invalid data type \"%s\" (%#x) for a SAMPLER register.",
+                vsir_data_type_get_name(reg->data_type, "<unknown>"), reg->data_type);
 
     /* VEC4 is allowed in gather operations. */
     if (reg->dimension == VSIR_DIMENSION_SCALAR)