diff --git a/cadcTomcat/src/ca/nrc/cadc/tomcat/CadcBasicAuthenticator.java b/cadcTomcat/src/ca/nrc/cadc/tomcat/CadcBasicAuthenticator.java
index eb8b69e40736cbae2265a7b8de3b6d1eb6a73e79..e4866d8fe6178cf4585a455d51e00f527006c1f6 100644
--- a/cadcTomcat/src/ca/nrc/cadc/tomcat/CadcBasicAuthenticator.java
+++ b/cadcTomcat/src/ca/nrc/cadc/tomcat/CadcBasicAuthenticator.java
@@ -78,6 +78,11 @@ import java.security.Principal;
 import java.util.Arrays;
 import java.util.List;
 
+import org.apache.catalina.realm.GenericPrincipal;
+import org.apache.catalina.realm.RealmBase;
+import org.apache.log4j.Level;
+import org.apache.log4j.Logger;
+
 /**
  * Custom class for Tomcat realm authentication.
  *