diff --git a/src/Makefile.am b/src/Makefile.am
index b6157d845b..9f86cc08fe 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -68,7 +68,6 @@ SUBDIRS = \
         mca \
         mpi \
         op \
-        os \
         proc \
         request \
         runtime \