diff --git a/src/main/java/org/datadog/jenkins/plugins/datadog/listeners/DatadogBuildListener.java b/src/main/java/org/datadog/jenkins/plugins/datadog/listeners/DatadogBuildListener.java
index ff8b16b7..c67b13ee 100644
--- a/src/main/java/org/datadog/jenkins/plugins/datadog/listeners/DatadogBuildListener.java
+++ b/src/main/java/org/datadog/jenkins/plugins/datadog/listeners/DatadogBuildListener.java
@@ -119,7 +119,7 @@ public void onInitialize(Run run) {
             BuildSpanManager.get().put(buildData.getBuildTag(""), buildSpanContext);
 
             TraceSpan.TraceSpanContext upstreamBuildSpanContext = null;
-            String upstreamBuildTag = buildData.getUpstreamBuildTag("");
+            String upstreamBuildTag = buildData.getUpstreamBuildTag(null);
             if (upstreamBuildTag != null) {
                 // try to find upstream build context saved earlier
                 upstreamBuildSpanContext = BuildSpanManager.get().get(upstreamBuildTag);