diff --git a/lib/AsmParser/Makefile b/lib/AsmParser/Makefile
index 2b85e1aaad1..865e112c517 100644
--- a/lib/AsmParser/Makefile
+++ b/lib/AsmParser/Makefile
@@ -7,15 +7,14 @@
 # 
 ##===----------------------------------------------------------------------===##
 
-LEVEL = ../..
-
-LIBRARYNAME = LLVMAsmParser
+LEVEL := ../..
+LIBRARYNAME := LLVMAsmParser
+BUILT_SOURCES := llvmAsmParser.cpp llvmAsmParser.h Lexer.cpp
 
 include $(LEVEL)/Makefile.common
 
 #
-# Make the source code file for the lexer depend upon the header file generated
-# by the Bison parser.  This prevents the generation of dependencies from
-# being performed until after the header file has been created.
-#
-Lexer.cpp: llvmAsmParser.h
+# Make the object code file for the lexer depend upon the header file generated
+# by the Bison parser.  This prevents the Lexer from being compiled before the
+# header file it needs is built.
+$(OBJDIR)/Lexer.o: llvmAsmParser.h