diff --git a/llvm/include/llvm/Support/FormattedStream.h b/llvm/include/llvm/Support/FormattedStream.h
index 09ab17c446e0..af546f0535dc 100644
--- a/llvm/include/llvm/Support/FormattedStream.h
+++ b/llvm/include/llvm/Support/FormattedStream.h
@@ -144,6 +144,10 @@ formatted_raw_ostream &fouts();
 /// standard error.  Use it like: ferrs() << "foo" << "bar";
 formatted_raw_ostream &ferrs();
 
+/// fdbgs() - This returns a reference to a formatted_raw_ostream for
+/// debug output.  Use it like: fdbgs() << "foo" << "bar";
+formatted_raw_ostream &fdbgs();
+
 } // end llvm namespace