diff --git a/Makefile.rules b/Makefile.rules
index 2b9b7fa1fc8..0e586a87f9c 100644
--- a/Makefile.rules
+++ b/Makefile.rules
@@ -681,8 +681,8 @@ $(LLVM_CONFIG):
         
 $(ToolDir)/$(strip $(TOOLNAME))$(EXEEXT): $(LLVM_CONFIG)
 
-ProjLibsOptions = $(shell $(LLVM_CONFIG) --libs     $(LINK_COMPONENTS))
-ProjLibsPaths   = $(LLVM_CONFIG) \
+ProjLibsOptions += $(shell $(LLVM_CONFIG) --libs     $(LINK_COMPONENTS))
+ProjLibsPaths   += $(LLVM_CONFIG) \
                   $(shell $(LLVM_CONFIG) --libfiles $(LINK_COMPONENTS))
 endif
 endif