diff --git a/cas-client-integration-tomcat/src/main/java/org/jasig/cas/client/tomcat/AbstractCasAuthenticator.java b/cas-client-integration-tomcat/src/main/java/org/jasig/cas/client/tomcat/AbstractCasAuthenticator.java
index aa0689a..61bf9aa 100644
--- a/cas-client-integration-tomcat/src/main/java/org/jasig/cas/client/tomcat/AbstractCasAuthenticator.java
+++ b/cas-client-integration-tomcat/src/main/java/org/jasig/cas/client/tomcat/AbstractCasAuthenticator.java
@@ -39,6 +39,6 @@ public abstract class AbstractCasAuthenticator extends AbstractAuthenticator {
     }
 
     protected final String getServiceParameterName() {
-        return "Service";
+        return "service";
     }
 }