diff --git a/default.xml b/default.xml
index 455e427..9af8922 100644
--- a/default.xml
+++ b/default.xml
@@ -99,7 +99,6 @@
   <project path="external/autotest" name="platform/external/autotest" groups="pdk-fs" />
   <project path="external/avb" name="platform/external/avb" groups="pdk" />
   <project path="external/bart" name="platform/external/bart" groups="pdk" />
-  <project path="external/bison" name="platform/external/bison" groups="pdk" />
   <project path="external/blktrace" name="platform/external/blktrace" groups="pdk-cw-fs,pdk-fs" />
   <project path="external/boringssl" name="platform/external/boringssl" groups="pdk" />
   <project path="external/bouncycastle" name="platform/external/bouncycastle" groups="pdk" />