diff --git a/tool/Command.cpp b/tool/Command.cpp
index 63a69e6d..dccc9d64 100644
--- a/tool/Command.cpp
+++ b/tool/Command.cpp
@@ -270,21 +270,21 @@ string Command::numericInfo()
 
 /*****************************************************************************/
 
-void Command::throwInvalidUsageException(const stringstream &s) const
+void Command::throwInvalidUsageException(const stringstream &s)
 {
     throw InvalidUsageException(s);
 }
 
 /*****************************************************************************/
 
-void Command::throwCommandException(const string &msg) const
+void Command::throwCommandException(const string &msg)
 {
     throw CommandException(msg);
 }
 
 /*****************************************************************************/
 
-void Command::throwCommandException(const stringstream &s) const
+void Command::throwCommandException(const stringstream &s)
 {
     throw CommandException(s);
 }
diff --git a/tool/Command.h b/tool/Command.h
index 70b41793..1f28723a 100644
--- a/tool/Command.h
+++ b/tool/Command.h
@@ -132,9 +132,9 @@ class Command
     protected:
         enum {BreakAfterBytes = 16};
 
-        void throwInvalidUsageException(const stringstream &) const;
-        void throwCommandException(const string &) const;
-        void throwCommandException(const stringstream &) const;
+        static void throwInvalidUsageException(const stringstream &);
+        static void throwCommandException(const string &);
+        static void throwCommandException(const stringstream &);
         void throwSingleSlaveRequired(unsigned int) const;
 
         typedef list<ec_ioctl_slave_t> SlaveList;