diff --git a/lib/modules/datasource/maven/index.spec.ts b/lib/modules/datasource/maven/index.spec.ts
index eec203b2520c78..757e328764afa2 100644
--- a/lib/modules/datasource/maven/index.spec.ts
+++ b/lib/modules/datasource/maven/index.spec.ts
@@ -711,6 +711,21 @@ describe('modules/datasource/maven/index', () => {
       expect(res).toBe(releaseOrig);
     });
 
+    it('returns original value for 200 response with versionOrig', async () => {
+      httpMock
+        .scope(MAVEN_REPO)
+        .head('/foo/bar/1.2.3/bar-1.2.3.pom')
+        .reply(200);
+      const releaseOrig: Release = { version: '1.2', versionOrig: '1.2.3' };
+
+      const res = await postprocessRelease(
+        { datasource, packageName: 'foo:bar', registryUrl: MAVEN_REPO },
+        releaseOrig,
+      );
+
+      expect(res).toBe(releaseOrig);
+    });
+
     it('returns original value for invalid configs', async () => {
       const releaseOrig: Release = { version: '1.2.3' };
       expect(
diff --git a/lib/modules/datasource/maven/index.ts b/lib/modules/datasource/maven/index.ts
index 8fd08b788131ab..aae05ab640bf48 100644
--- a/lib/modules/datasource/maven/index.ts
+++ b/lib/modules/datasource/maven/index.ts
@@ -254,7 +254,7 @@ export class MavenDatasource extends Datasource {
       { registryUrl, packageName }: PostprocessReleaseConfig,
       { version, versionOrig }: Release,
     ) =>
-      `postprocessRelease:${registryUrl}:${packageName}:${versionOrig ?? version}`,
+      `postprocessRelease:${registryUrl}:${packageName}:${versionOrig ? `${versionOrig}:${version}` : `${version}`}`,
     ttlMinutes: 24 * 60,
   })
   override async postprocessRelease(