diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp
index 92fa8b50a15..cb9648981a3 100644
--- a/lib/Support/raw_ostream.cpp
+++ b/lib/Support/raw_ostream.cpp
@@ -447,7 +447,8 @@ raw_fd_ostream::raw_fd_ostream(const char *Filename, std::string &ErrorInfo,
   error_code EC = sys::fs::openFileForWrite(Filename, FD, Flags);
 
   if (EC) {
-    ErrorInfo = "Error opening output file '" + std::string(Filename) + "'";
+    ErrorInfo = "Error opening output file '" + std::string(Filename) + "': " +
+                EC.message();
     ShouldClose = false;
     return;
   }