diff --git a/libs/vkd3d-shader/spirv.c b/libs/vkd3d-shader/spirv.c
index 8037c1b3d..c64c5e15a 100644
--- a/libs/vkd3d-shader/spirv.c
+++ b/libs/vkd3d-shader/spirv.c
@@ -8813,7 +8813,9 @@ static void spirv_compiler_emit_deriv_instruction(struct spirv_compiler *compile
     }
     if (!info)
     {
-        ERR("Unexpected instruction %#x.\n", instruction->opcode);
+        spirv_compiler_error(compiler, VKD3D_SHADER_ERROR_SPV_NOT_IMPLEMENTED,
+                "Unhandled instruction \"%s\" (%#x).",
+                vsir_opcode_get_name(instruction->opcode, "<unknown>"), instruction->opcode);
         return;
     }