diff --git a/solr/core/src/java/org/apache/solr/servlet/PrometheusMetricsServlet.java b/solr/core/src/java/org/apache/solr/servlet/PrometheusMetricsServlet.java
index 782af4061d2..517966f7813 100644
--- a/solr/core/src/java/org/apache/solr/servlet/PrometheusMetricsServlet.java
+++ b/solr/core/src/java/org/apache/solr/servlet/PrometheusMetricsServlet.java
@@ -1028,7 +1028,7 @@ private abstract static class MetricsByPrefixApiCaller extends MetricsApiCaller
       this.group = group;
       this.prefix = prefix;
       this.properties = properties;
-      this.property = properties.length > 1 ? properties[0] : null;
+      this.property = properties.length > 0 ? properties[0] : null;
     }
 
     @Override