1 files changed, 3 insertions, 3 deletions
diff --git a/lib/info_simple.h b/lib/info_simple.h
index 302a371..0dfbe0c 100644
--- a/lib/info_simple.h
+++ b/lib/info_simple.h
@@ -35,9 +35,9 @@ public:
   InfoSimple();
   ~InfoSimple();
 
-  void error(char* fmt, ...);
-  void warn(char* fmt, ...);
-  void info(char* fmt, ...);
+  void error(const char* fmt, ...);
+  void warn(const char* fmt, ...);
+  void info(const char* fmt, ...);
 
 private:
 };