diff --git a/webrtc/tools/simple_command_line_parser.cc b/webrtc/tools/simple_command_line_parser.cc
index d7757ed38e..d6a8c1b795 100644
--- a/webrtc/tools/simple_command_line_parser.cc
+++ b/webrtc/tools/simple_command_line_parser.cc
@@ -19,6 +19,9 @@ namespace test {
 
 using std::string;
 
+CommandLineParser::CommandLineParser() {}
+CommandLineParser::~CommandLineParser() {}
+
 void CommandLineParser::Init(int argc, char** argv) {
   args_ = std::vector<std::string> (argv + 1, argv + argc);
 }
diff --git a/webrtc/tools/simple_command_line_parser.h b/webrtc/tools/simple_command_line_parser.h
index f791fe9623..348e8c3db1 100644
--- a/webrtc/tools/simple_command_line_parser.h
+++ b/webrtc/tools/simple_command_line_parser.h
@@ -34,8 +34,8 @@ namespace test {
 
 class CommandLineParser {
  public:
-  CommandLineParser() {}
-  ~CommandLineParser() {}
+  CommandLineParser();
+  ~CommandLineParser();
 
   void Init(int argc, char** argv);