diff --git a/lldb/source/Commands/CommandObjectSource.cpp b/lldb/source/Commands/CommandObjectSource.cpp
index 55e724a..b0231a7 100644
--- a/lldb/source/Commands/CommandObjectSource.cpp
+++ b/lldb/source/Commands/CommandObjectSource.cpp
@@ -585,7 +585,7 @@
 
     if (argc != 0) {
       result.AppendErrorWithFormat("'%s' takes no arguments, only flags.\n",
-                                   GetCommandName());
+                                   GetCommandName().str().c_str());
       result.SetStatus(eReturnStatusFailed);
       return false;
     }
@@ -990,7 +990,7 @@
 
     if (argc != 0) {
       result.AppendErrorWithFormat("'%s' takes no arguments, only flags.\n",
-                                   GetCommandName());
+                                   GetCommandName().str().c_str());
       result.SetStatus(eReturnStatusFailed);
       return false;
     }