diff --git a/clang/lib/Driver/Tools.h b/clang/lib/Driver/Tools.h
index 873969b..4fe42b8 100644
--- a/clang/lib/Driver/Tools.h
+++ b/clang/lib/Driver/Tools.h
@@ -209,6 +209,10 @@
   const char* getLLVMArchSuffixForARM(StringRef CPU);
 }
 
+namespace mips {
+  bool hasMipsAbiArg(const llvm::opt::ArgList &Args, const char *Value);
+}
+
 namespace darwin {
   llvm::Triple::ArchType getArchTypeForMachOArchName(StringRef Str);
   void setTripleTypeForMachOArchName(llvm::Triple &T, StringRef Str);