diff --git a/lib/workers/repository/process/lookup/index.ts b/lib/workers/repository/process/lookup/index.ts
index 9edb8fed95b853565275ba4b554749d5b6ef2e18..e78aeee8954570d16651dcdde416db228a9d4a49 100644
--- a/lib/workers/repository/process/lookup/index.ts
+++ b/lib/workers/repository/process/lookup/index.ts
@@ -171,6 +171,12 @@ export async function lookupUpdates(
           unconstrainedValue ||
           versioning.matches(v.version, config.currentValue!)
       );
+      if (!allSatisfyingVersions.length) {
+        logger.debug(
+          `Found no satisfying versions with '${config.versioning}' versioning`
+        );
+      }
+
       if (config.rollbackPrs && !allSatisfyingVersions.length) {
         const rollback = getRollbackUpdate(config, allVersions, versioning);
         // istanbul ignore if