diff --git a/mime/java-res/android.mime.types b/mime/java-res/android.mime.types
index 92365d1af4c923f790b8c839024ca05e6621f579..587367737be0d556f6479509b446bb790c5e535d 100644
--- a/mime/java-res/android.mime.types
+++ b/mime/java-res/android.mime.types
@@ -139,7 +139,7 @@
 # that may have been defined earlier.
 
 application/pgp-signature pgp
-application/x-x509-ca-cert crt
+application/x-x509-ca-cert crt der
 audio/aac aac adts adt
 audio/basic snd
 audio/flac flac