diff --git a/checkstyle/chromium-style-5.0.xml b/checkstyle/chromium-style-5.0.xml
index 03d7bcf..cd32e9d 100644
--- a/checkstyle/chromium-style-5.0.xml
+++ b/checkstyle/chromium-style-5.0.xml
@@ -126,5 +126,12 @@
       <property name="ignoreComments" value="true"/>
       <property name="message" value="Use ContextUtils.getAppSharedPreferences() instead to access app-wide SharedPreferences."/>
     </module>
+    <module name="RegexpSinglelineJava">
+      <property name="id" value="ConcurrentHashMapCheck"/>
+      <property name="severity" value="error"/>
+      <property name="format" value="ConcurrentHashMap"/>
+      <property name="ignoreComments" value="true"/>
+      <property name="message" value="ConcurrentHashMap has a bug on some Android versions. Use Collections.synchronizedMap() instead (crbug.com/905903)."/>
+    </module>
   </module>
 </module>