diff --git a/include/ZmqLogger.h b/include/ZmqLogger.h
index 96e16213..84729500 100644
--- a/include/ZmqLogger.h
+++ b/include/ZmqLogger.h
@@ -96,12 +96,13 @@ namespace openshot {
 		static ZmqLogger * Instance();
 
 		/// Append debug information
-		void AppendDebugMethod(string method_name, string arg1_name, float arg1_value,
-							   string arg2_name, float arg2_value,
-							   string arg3_name, float arg3_value,
-							   string arg4_name, float arg4_value,
-							   string arg5_name, float arg5_value,
-							   string arg6_name, float arg6_value);
+		void AppendDebugMethod(std::string method_name,
+					std::string arg1_name="", float arg1_value=-0.0,
+					std::string arg2_name="", float arg2_value=-0.0,
+					std::string arg3_name="", float arg3_value=-0.0,
+					std::string arg4_name="", float arg4_value=-0.0,
+					std::string arg5_name="", float arg5_value=-0.0,
+					std::string arg6_name="", float arg6_value=-0.0);
 
 		/// Close logger (sockets and/or files)
 		void Close();
diff --git a/src/ZmqLogger.cpp b/src/ZmqLogger.cpp
index f9ecc875..7cf69228 100644
--- a/src/ZmqLogger.cpp
+++ b/src/ZmqLogger.cpp
@@ -162,12 +162,13 @@ void ZmqLogger::Close()
 }
 
 // Append debug information
-void ZmqLogger::AppendDebugMethod(string method_name, string arg1_name, float arg1_value,
-								   string arg2_name, float arg2_value,
-								   string arg3_name, float arg3_value,
-								   string arg4_name, float arg4_value,
-								   string arg5_name, float arg5_value,
-								   string arg6_name, float arg6_value)
+void ZmqLogger::AppendDebugMethod(string method_name,
+				  string arg1_name, float arg1_value,
+				  string arg2_name, float arg2_value,
+				  string arg3_name, float arg3_value,
+				  string arg4_name, float arg4_value,
+				  string arg5_name, float arg5_value,
+				  string arg6_name, float arg6_value)
 {
 	if (!enabled)
 		// Don't do anything
@@ -206,4 +207,4 @@ void ZmqLogger::AppendDebugMethod(string method_name, string arg1_name, float ar
 		// Send message through ZMQ
 		Log(message.str());
 	}
-}
\ No newline at end of file
+}