1 files changed, 7 insertions, 7 deletions

diff --git a/src/SimpleLogger.h b/src/SimpleLogger.h
index 4b3843a2..5caab527 100644
--- a/src/SimpleLogger.h
+++ b/src/SimpleLogger.h
@@ -30,19 +30,19 @@ private:
     DEBUG,
     INFO,
     ERROR};
-  void writeLog(int level, string msg, va_list ap, Exception* e = NULL);
+  void writeLog(int level, string msg, va_list ap, Exception* e = NULL) const;
   FILE* file;
 public:
   SimpleLogger(string filename);
   SimpleLogger(FILE* logfile);
   ~SimpleLogger();
 
-  void debug(string msg, ...);
-  void debug(string msg, Exception* ex, ...);
-  void info(string msg, ...);
-  void info(string msg, Exception* ex, ...);
-  void error(string msg, ...);
-  void error(string msg, Exception* ex, ...);
+  void debug(string msg, ...) const;
+  void debug(string msg, Exception* ex, ...) const;
+  void info(string msg, ...) const;
+  void info(string msg, Exception* ex, ...) const;
+  void error(string msg, ...) const;
+  void error(string msg, Exception* ex, ...) const;
 };
 
 #endif // _D_SIMPLE_LOGGER_H_