diff --git a/solr/core/src/java/org/apache/solr/handler/admin/SystemInfoHandler.java b/solr/core/src/java/org/apache/solr/handler/admin/SystemInfoHandler.java
index 94fb0553768..fc1679ff896 100644
--- a/solr/core/src/java/org/apache/solr/handler/admin/SystemInfoHandler.java
+++ b/solr/core/src/java/org/apache/solr/handler/admin/SystemInfoHandler.java
@@ -445,7 +445,7 @@ public class SystemInfoHandler extends RequestHandlerBase
     List<String> list = new LinkedList<>();
     for (String arg : mx.getInputArguments()) {
       if (arg.startsWith("-D") && arg.contains("=") && RedactionUtils.isSystemPropertySensitive(arg.substring(2, arg.indexOf("=")))) {
-        list.add(String.format("%s=%s", arg.substring(0, arg.indexOf("=")), REDACT_STRING));
+        list.add(String.format(Locale.ROOT, "%s=%s", arg.substring(0, arg.indexOf("=")), REDACT_STRING));
       } else {
         list.add(arg);
       }