diff --git a/lib/Target/X86/Disassembler/Makefile b/lib/Target/X86/Disassembler/Makefile
index b45148f68f6..51e7b828cf2 100644
--- a/lib/Target/X86/Disassembler/Makefile
+++ b/lib/Target/X86/Disassembler/Makefile
@@ -14,3 +14,5 @@ LIBRARYNAME = LLVMX86Disassembler
 CPP.Flags += -I$(PROJ_OBJ_DIR)/.. -I$(PROJ_SRC_DIR)/..
 
 include $(LEVEL)/Makefile.common
+
+.PHONY: $(PROJ_SRC_DIR)/X86DisassemblerDecoder.c