diff --git a/unittests/System/Makefile b/unittests/System/Makefile
index 336ac30383d..368cf328690 100644
--- a/unittests/System/Makefile
+++ b/unittests/System/Makefile
@@ -9,7 +9,7 @@
 
 LEVEL = ../..
 TESTNAME = System
-LINK_COMPONENTS := system
+LINK_COMPONENTS := system support
 
 include $(LEVEL)/Makefile.config
 include $(LLVM_SRC_ROOT)/unittests/Makefile.unittest