diff --git a/utility/Utils.cpp b/utility/Utils.cpp
index 5b32bad..2109fb9 100644
--- a/utility/Utils.cpp
+++ b/utility/Utils.cpp
@@ -5,14 +5,14 @@ namespace Utils {
 #define DEBUG_BLINK_PIN 13	     // Connected to debug led
 //#define VERBOSE_DEBUG 1	     // Verbose
 
-	void LogLn(char*s)
+	void LogLn(char const *s)
 	{
 	#ifdef VERBOSE_DEBUG
 		Serial.println(s);
 	#endif
 	}
 
-	void Log(char*s)
+	void Log(char const *s)
 	{
 	#ifdef VERBOSE_DEBUG
 	  Serial.print(s);
diff --git a/utility/Utils.h b/utility/Utils.h
index 0b08811..dd8b486 100644
--- a/utility/Utils.h
+++ b/utility/Utils.h
@@ -12,8 +12,8 @@
 #define intRestore(sreg)  SREG = sreg 
 
 namespace Utils {	
-	void Log(char*s);
-	void LogLn(char*s);
+	void Log(char const *s);
+	void LogLn(char const *s);
 	void Log(int i,char format);
 	void LogLn(int i,char format);
 	void Log(int i);