Add platform/external/mpdecimal
diff --git a/default.xml b/default.xml
index 63528a9..3c270d0 100644
--- a/default.xml
+++ b/default.xml
@@ -1033,6 +1033,7 @@
   <project name="platform/external/moshi" />
   <project name="platform/external/mp4parser" />
   <project name="platform/external/mp4v2" />
+  <project name="platform/external/mpdecimal" />
   <project name="platform/external/mpg123" />
   <project name="platform/external/ms-tpm-20-ref" />
   <project name="platform/external/mtools" />