diff --git a/databases/Makefile b/databases/Makefile
index 93dae08498c6..5856cb6b0cc1 100644
--- a/databases/Makefile
+++ b/databases/Makefile
@@ -31,6 +31,7 @@
     SUBDIR += db44
     SUBDIR += db45
     SUBDIR += db46
+    SUBDIR += db47
     SUBDIR += db4o-mono
     SUBDIR += dbXML
     SUBDIR += dbconnect