diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
index 2d57abdb3cf..c0be0ecb34e 100644
--- a/lib/Support/CommandLine.cpp
+++ b/lib/Support/CommandLine.cpp
@@ -400,7 +400,7 @@ void cl::ParseCommandLineOptions(int &argc, char **argv,
     }
 
     if (Handler == 0) {
-      std::cerr << "Unknown command line argument '" << argv[i] << "'.  Try: "
+      std::cerr << "Unknown command line argument '" << argv[i] << "'.  Try: '"
                 << argv[0] << " --help'\n";
       ErrorParsing = true;
       continue;
diff --git a/support/lib/Support/CommandLine.cpp b/support/lib/Support/CommandLine.cpp
index 2d57abdb3cf..c0be0ecb34e 100644
--- a/support/lib/Support/CommandLine.cpp
+++ b/support/lib/Support/CommandLine.cpp
@@ -400,7 +400,7 @@ void cl::ParseCommandLineOptions(int &argc, char **argv,
     }
 
     if (Handler == 0) {
-      std::cerr << "Unknown command line argument '" << argv[i] << "'.  Try: "
+      std::cerr << "Unknown command line argument '" << argv[i] << "'.  Try: '"
                 << argv[0] << " --help'\n";
       ErrorParsing = true;
       continue;