diff --git a/lldb/tools/lldb-vscode/lldb-vscode.cpp b/lldb/tools/lldb-vscode/lldb-vscode.cpp
index b6a3fc8ffa3b..f39dbbf65e1f 100644
--- a/lldb/tools/lldb-vscode/lldb-vscode.cpp
+++ b/lldb/tools/lldb-vscode/lldb-vscode.cpp
@@ -436,7 +436,7 @@ void SetSourceMapFromArguments(const llvm::json::Object &arguments) {
       }
       auto mapFrom = GetAsString((*mapping)[0]);
       auto mapTo = GetAsString((*mapping)[1]);
-      strm << "\"" << mapFrom << "\" \"" << mapTo << "\"";
+      strm << "\"" << mapFrom << "\" \"" << mapTo << "\" ";
     }
   } else {
     if (ObjectContainsKey(arguments, "sourceMap")) {
@@ -2582,7 +2582,7 @@ const std::map<std::string, RequestCallback> &GetRequestHandlers() {
 #undef REQUEST_CALLBACK
   return g_request_handlers;
 }
-  
+
 } // anonymous namespace
 
 int main(int argc, char *argv[]) {