diff --git a/src/main/java/com/gitblit/Constants.java b/src/main/java/com/gitblit/Constants.java
index 6232552..acfc204 100644
--- a/src/main/java/com/gitblit/Constants.java
+++ b/src/main/java/com/gitblit/Constants.java
@@ -62,6 +62,12 @@
 	public static final String GIT_PATH = "/git/";
 	
 	public static final String REGEX_SHA256 = "[a-fA-F0-9]{64}";
+	
+	/**
+	 * This regular expression is used when searching for "mentions" in tickets
+	 * (when someone writes @thisOtherUser)
+	 */
+	public static final String REGEX_TICKET_MENTION = "\\s@([^\\s]+)";
 
 	public static final String ZIP_PATH = "/zip/";