diff --git a/findbugs-exclude-filter.xml b/findbugs-exclude-filter.xml
index 778c72fe5..7502b2cb4 100644
--- a/findbugs-exclude-filter.xml
+++ b/findbugs-exclude-filter.xml
@@ -250,6 +250,11 @@
     <Method name="getDataRef" params="" returns="org.apache.commons.math3.FieldElement[]" />
     <Bug pattern="EI_EXPOSE_REP" />
   </Match>
+  <Match>
+    <Class name="org.apache.commons.math3.linear.DiagonalMatrix"/>
+    <Method name="getDataRef" params="" returns="double[]" />
+    <Bug pattern="EI_EXPOSE_REP" />
+  </Match>
   <!-- The equals method for RealVector intentionally throws an exception -->
   <Match>
     <Class name="org.apache.commons.math3.linear.RealVector"/>