diff --git a/bootstrap.sh b/bootstrap.sh
index 59e0007..d2e240a 100755
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-subdirs="compiler/cpp lib/cpp lib/py"
+subdirs="compiler/cpp lib/cpp lib/py if"
 
 ./cleanup.sh
 echo "SUBDIRS = ${subdirs}" > Makefile.am