Use uppercase for long literal suffix.
diff --git a/src/main/java/org/apache/commons/validator/util/Flags.java b/src/main/java/org/apache/commons/validator/util/Flags.java
index 21ba4a0..41aa7ab 100644
--- a/src/main/java/org/apache/commons/validator/util/Flags.java
+++ b/src/main/java/org/apache/commons/validator/util/Flags.java
@@ -136,7 +136,7 @@
      * Turn on all 64 flags.
      */
     public void turnOnAll() {
-        this.flags = 0xFFFFFFFFFFFFFFFFl;
+        this.flags = 0xFFFFFFFFFFFFFFFFL;
     }
 
     /**