diff --git a/runtime/Makefile b/runtime/Makefile
index c84ada158a6..bdbdc40d1f7 100644
--- a/runtime/Makefile
+++ b/runtime/Makefile
@@ -12,7 +12,7 @@ LEVEL = ..
 include $(LEVEL)/Makefile.config
 
 ifneq ($(wildcard $(LLVMGCCDIR)),)
-PARALLEL_DIRS  := GCCLibraries  libdummy  libprofile  libtrace 
+PARALLEL_DIRS  := GCCLibraries  libdummy  libprofile  libtrace GC
 else
 PARALLEL_DIRS  := 
 install all ::