diff --git a/mozilla/base/src/Makefile b/mozilla/base/src/Makefile
index d0d13be34db..cb53bc867c8 100644
--- a/mozilla/base/src/Makefile
+++ b/mozilla/base/src/Makefile
@@ -19,6 +19,8 @@ DEPTH=../..
 
 DEFINES =-D_IMPL_NS_BASE
 
+DIRS = unix
+
 LIBRARY_NAME = raptorbase
 
 CPPSRCS =                       \