diff --git a/core/src/main/java/hudson/model/UpdateSite.java b/core/src/main/java/hudson/model/UpdateSite.java
index 6e76186a33..a7d0d07edb 100644
--- a/core/src/main/java/hudson/model/UpdateSite.java
+++ b/core/src/main/java/hudson/model/UpdateSite.java
@@ -560,7 +560,7 @@ public class UpdateSite {
         public boolean isForNewerHudson() {
             try {
                 return requiredCore!=null && new VersionNumber(requiredCore).isNewerThan(
-                    new VersionNumber(Hudson.VERSION.replaceFirst("SHOT *\(private.*\)", "SHOT")));
+                  new VersionNumber(Hudson.VERSION.replaceFirst("SHOT *\\(private.*\\)", "SHOT")));
             } catch (NumberFormatException nfe) {
                 return true;  // If unable to parse version
             }