diff --git a/b2g/config/mozconfigs/macosx64_gecko/debug b/b2g/config/mozconfigs/macosx64_gecko/debug
index a8feab6a1a4..7b8c32a5512 100644
--- a/b2g/config/mozconfigs/macosx64_gecko/debug
+++ b/b2g/config/mozconfigs/macosx64_gecko/debug
@@ -1,3 +1,4 @@
+. "$topsrcdir/b2g/config/mozconfigs/common"
 . $topsrcdir/build/macosx/mozconfig.common
 
 ac_add_options --enable-update-channel=${MOZ_UPDATE_CHANNEL}
diff --git a/b2g/config/mozconfigs/macosx64_gecko/nightly b/b2g/config/mozconfigs/macosx64_gecko/nightly
index 2be553c4e03..f3110e67e27 100644
--- a/b2g/config/mozconfigs/macosx64_gecko/nightly
+++ b/b2g/config/mozconfigs/macosx64_gecko/nightly
@@ -1,3 +1,4 @@
+. "$topsrcdir/b2g/config/mozconfigs/common"
 . $topsrcdir/build/macosx/mozconfig.common
 
 ac_add_options --enable-update-channel=${MOZ_UPDATE_CHANNEL}