diff --git a/llvm/lib/Target/Makefile b/llvm/lib/Target/Makefile
index 81e84745b725..59f50fef0bd8 100644
--- a/llvm/lib/Target/Makefile
+++ b/llvm/lib/Target/Makefile
@@ -15,5 +15,6 @@ BUILD_ARCHIVE = 1
 # value for PARALLEL_DIRS which must be set before Makefile.rules is included
 include $(LEVEL)/Makefile.config
 
-include $(LLVM_SRC_ROOT)/Makefile.rules
+PARALLEL_DIRS := $(TARGETS_TO_BUILD)
 
+include $(LLVM_SRC_ROOT)/Makefile.rules