diff --git a/include/llvm/Support/CommandLine.h b/include/llvm/Support/CommandLine.h
index 3cc2c3c0121..63784463e17 100644
--- a/include/llvm/Support/CommandLine.h
+++ b/include/llvm/Support/CommandLine.h
@@ -2000,6 +2000,9 @@ void ResetAllOptionOccurrences();
 /// where no options are supported.
 void ResetCommandLineParser();
 
+/// Parses `Arg` into the option handler `Handler`.
+bool ProvidePositionalOption(Option *Handler, StringRef Arg, int i);
+
 } // end namespace cl
 
 } // end namespace llvm
diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
index 25510fa58ff..620f7ffd4c9 100644
--- a/lib/Support/CommandLine.cpp
+++ b/lib/Support/CommandLine.cpp
@@ -692,7 +692,7 @@ static inline bool ProvideOption(Option *Handler, StringRef ArgName,
   return false;
 }
 
-static bool ProvidePositionalOption(Option *Handler, StringRef Arg, int i) {
+bool llvm::cl::ProvidePositionalOption(Option *Handler, StringRef Arg, int i) {
   int Dummy = i;
   return ProvideOption(Handler, Handler->ArgStr, Arg, 0, nullptr, Dummy);
 }