diff --git a/packages/language-core/src/generators/script.ts b/packages/language-core/src/generators/script.ts
index d3bc08318d..d12a704b5e 100644
--- a/packages/language-core/src/generators/script.ts
+++ b/packages/language-core/src/generators/script.ts
@@ -118,6 +118,7 @@ export function generate(
 						default: D[K]
 					}> : P[K]
 				};\n`);
+			codes.push(`type __VLS_Prettify<T> = { [K in keyof T]: T[K]; } & {};\n`);
 		}
 		if (usedHelperTypes.WithTemplateSlots) {
 			codes.push(
diff --git a/packages/tsc/tests/__snapshots__/dts.spec.ts.snap b/packages/tsc/tests/__snapshots__/dts.spec.ts.snap
index 3b34d22a6f..d425810cef 100644
--- a/packages/tsc/tests/__snapshots__/dts.spec.ts.snap
+++ b/packages/tsc/tests/__snapshots__/dts.spec.ts.snap
@@ -196,6 +196,9 @@ type __VLS_WithDefaults<P, D> = {
         default: D[K];
     }> : P[K];
 };
+type __VLS_Prettify<T> = {
+    [K in keyof T]: T[K];
+} & {};
 "
 `;