diff --git a/slf4j-api/src/main/java/org/slf4j/LoggerFactory.java b/slf4j-api/src/main/java/org/slf4j/LoggerFactory.java
index caea492c..5cf70964 100644
--- a/slf4j-api/src/main/java/org/slf4j/LoggerFactory.java
+++ b/slf4j-api/src/main/java/org/slf4j/LoggerFactory.java
@@ -98,7 +98,7 @@ public final class LoggerFactory {
    */
   public static Logger getLogger(Class clazz) {
     if(loggerFactory == null) {
-      throw new IllegalStateException("Logging factory implementation cannot be null. See also http://www.slf4j.org/codes.html#null_LF");
+      throw new IllegalStateException("Logging factory implementation cannot be null. See also "+NULL_LF_URL);
     }
     return loggerFactory.getLogger(clazz.getName());
   }