diff --git a/src/main/java/org/apache/xmlgraphics/image/loader/cache/ImageCacheStatistics.java b/src/main/java/org/apache/xmlgraphics/image/loader/cache/ImageCacheStatistics.java
index 88e7dcb..c484a45 100644
--- a/src/main/java/org/apache/xmlgraphics/image/loader/cache/ImageCacheStatistics.java
+++ b/src/main/java/org/apache/xmlgraphics/image/loader/cache/ImageCacheStatistics.java
@@ -75,7 +75,7 @@
         if (v == null) {
             v = 1;
         } else {
-            v++;
+            v += 1;
         }
         map.put(key, v);
     }
diff --git a/src/tools/resources/findbugs/exclusions.xml b/src/tools/resources/findbugs/exclusions.xml
index f5f2d49..935cb56 100644
--- a/src/tools/resources/findbugs/exclusions.xml
+++ b/src/tools/resources/findbugs/exclusions.xml
@@ -4,6 +4,8 @@
     <Or>
       <Bug pattern="EI_EXPOSE_REP"/>
       <Bug pattern="EI_EXPOSE_REP2"/>
+      <Bug pattern="MC_OVERRIDABLE_METHOD_CALL_IN_CONSTRUCTOR"/>
+      <Bug pattern="MS_EXPOSE_REP"/>
     </Or>
   </Match>
   <Match>