diff --git a/styleguide/pmd-ruleset.xml b/styleguide/pmd-ruleset.xml
index 24cfd0dd11..d63d3d2d49 100644
--- a/styleguide/pmd-ruleset.xml
+++ b/styleguide/pmd-ruleset.xml
@@ -57,6 +57,7 @@
     <exclude name="AvoidSynchronizedAtMethodLevel" />
     <exclude name="AvoidUsingVolatile" />
     <exclude name="DoNotUseThreads" />
+    <exclude name="UseConcurrentHashMap" />
   </rule>
 
   <rule ref="category/java/performance.xml">
diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/filters/LinearDigitalFilter.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/filters/LinearDigitalFilter.java
index d9b7b93604..57ec9ee23d 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/filters/LinearDigitalFilter.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/filters/LinearDigitalFilter.java
@@ -66,8 +66,8 @@ public class LinearDigitalFilter extends Filter {
    * @param ffGains The "feed forward" or FIR gains
    * @param fbGains The "feed back" or IIR gains
    */
-  public LinearDigitalFilter(PIDSource source, double[] ffGains, //NOPMD - PR1105 will fix this
-                             double[] fbGains) { //NOPMD - PR1105 will fix this
+  public LinearDigitalFilter(PIDSource source, double[] ffGains,
+                             double[] fbGains) {
     super(source);
     m_inputs = new CircularBuffer(ffGains.length);
     m_outputs = new CircularBuffer(fbGains.length);