diff --git a/external/bz2/bz2.conf b/external/bz2/bz2.conf
index 7a11199a5e..53850a1947 100644
--- a/external/bz2/bz2.conf
+++ b/external/bz2/bz2.conf
@@ -1,4 +1,5 @@
 ##begin config
+basename BZ2
 version 2.3
 libbase BZ2Base
 libbasetype struct BZ2Base