diff --git a/vars/whitesourceExecuteScan.groovy b/vars/whitesourceExecuteScan.groovy
index 97c3ca8a1..9436275bd 100644
--- a/vars/whitesourceExecuteScan.groovy
+++ b/vars/whitesourceExecuteScan.groovy
@@ -73,6 +73,10 @@ import static com.sap.piper.Prerequisites.checkScript
     'verbose'
 ]
 @Field Set STEP_CONFIG_KEYS = GENERAL_CONFIG_KEYS + [
+    /**
+     * Additional install command that can be used to populate the default docker image for some scenarios.
+     */
+    'additionalInstallCommand',
     /**
      * URL used to download the latest version of the WhiteSource Unified Agent.
      */