diff --git a/checkstyle-circle.xml b/checkstyle-circle.xml
index a79edd9..ec6cac3 100644
--- a/checkstyle-circle.xml
+++ b/checkstyle-circle.xml
@@ -12,6 +12,7 @@
    - Remove PLUS from operator newline required
    - Remove VariableDeclarationUsageDistance
    - The opening and closing curly brace of an empty constructor body or empty method body can be on the same line
+   - Require that classes have package declarations, and that package names match the directory names for source files
  -->
 
 <!--
@@ -131,6 +132,7 @@
             <message key="name.invalidPattern"
              value="Package name ''{0}'' must match pattern ''{1}''."/>
         </module>
+        <module name="PackageDeclaration"/>
         <module name="TypeName">
             <message key="name.invalidPattern"
              value="Type name ''{0}'' must match pattern ''{1}''."/>
diff --git a/checkstyle-without-formatting.xml b/checkstyle-without-formatting.xml
index feaff89..c22677f 100644
--- a/checkstyle-without-formatting.xml
+++ b/checkstyle-without-formatting.xml
@@ -69,6 +69,7 @@
             <message key="name.invalidPattern"
                      value="Package name ''{0}'' must match pattern ''{1}''."/>
         </module>
+        <module name="PackageDeclaration"/>
         <module name="TypeName">
             <message key="name.invalidPattern"
                      value="Type name ''{0}'' must match pattern ''{1}''."/>