diff --git a/src/core/astBuilder.ts b/src/core/astBuilder.ts
index 29df675..6385600 100644
--- a/src/core/astBuilder.ts
+++ b/src/core/astBuilder.ts
@@ -48,6 +48,15 @@ export function buildStringLiteralTypeNode(s: string): ts.LiteralTypeNode {
     return ts.factory.createLiteralTypeNode(ts.factory.createStringLiteral(s));
 }
 export function buildNumericLiteralTypeNode(n: string): ts.LiteralTypeNode {
+    if (!isNaN(parseFloat(n)) && parseFloat(n) < 0) {
+        return ts.factory.createLiteralTypeNode(
+            ts.factory.createPrefixUnaryExpression(
+                ts.SyntaxKind.MinusToken,
+                ts.factory.createNumericLiteral(Math.abs(parseFloat(n))),
+            ),
+        );
+    }
+
     return ts.factory.createLiteralTypeNode(ts.factory.createNumericLiteral(n));
 }
 export function buildBooleanLiteralTypeNode(b: boolean): ts.LiteralTypeNode {
diff --git a/test/simple_schema_test.ts b/test/simple_schema_test.ts
index c8db112..1313464 100644
--- a/test/simple_schema_test.ts
+++ b/test/simple_schema_test.ts
@@ -251,6 +251,31 @@ describe('simple schema test', () => {
         numbers?: "001" | "002" | "003" | "004" | "005" | "006" | "007" | "008" | "009" | "010";
     }
 }
+`;
+        assert.strictEqual(result, expected, result);
+    });
+    it('positive and negative number type enum schema', async () => {
+        const schema: JsonSchemaDraft04.Schema = {
+            id: '/test/positive_negative_number_type',
+            type: 'object',
+            properties: {
+                numbers: {
+                    enum: [1, -1],
+                    example: '1',
+                },
+            },
+        };
+        const result = await dtsgenerator({ contents: [parseSchema(schema)] });
+
+        const expected = `declare namespace Test {
+    export interface PositiveNegativeNumberType {
+        /**
+         * example:
+         * 1
+         */
+        numbers?: 1 | -1;
+    }
+}
 `;
         assert.strictEqual(result, expected, result);
     });