diff --git a/packages/common/src/common.ts b/packages/common/src/common.ts
index 1ee56627c7..9c18337ab3 100644
--- a/packages/common/src/common.ts
+++ b/packages/common/src/common.ts
@@ -962,7 +962,7 @@ export class Common {
   hardforks(): HardforkTransitionConfig[] {
     const hfs = this._chainParams.hardforks
     if (this._chainParams.customHardforks !== undefined) {
-      this._chainParams.customHardforks
+      return this._chainParams.customHardforks
     }
     return hfs
   }