diff --git a/Core/src/org/sleuthkit/autopsy/modules/fileextmismatch/mismatch_config.xml b/Core/src/org/sleuthkit/autopsy/modules/fileextmismatch/mismatch_config.xml
index 59bccd5f57..a89cb7f421 100644
--- a/Core/src/org/sleuthkit/autopsy/modules/fileextmismatch/mismatch_config.xml
+++ b/Core/src/org/sleuthkit/autopsy/modules/fileextmismatch/mismatch_config.xml
@@ -228,6 +228,7 @@
   <ext>tile</ext>
  </signature>
  <signature mimetype="image/png">
+  <ext>avatar</ext>
   <ext>gif</ext>
   <ext>jpeg</ext>
   <ext>jpg</ext>