diff --git a/src/FDM/YASim/Rotorpart.cpp b/src/FDM/YASim/Rotorpart.cpp
index 873699002..77520dee9 100644
--- a/src/FDM/YASim/Rotorpart.cpp
+++ b/src/FDM/YASim/Rotorpart.cpp
@@ -111,7 +111,7 @@ void Rotorpart::setRotor(Rotor *rotor)
     _rotor=rotor;
 }
 
-void Rotorpart::setParameter(char *parametername, float value)
+void Rotorpart::setParameter(const char *parametername, float value)
 {
 #define p(a) if (strcmp(parametername,#a)==0) _##a = value; else
 
diff --git a/src/FDM/YASim/Rotorpart.hpp b/src/FDM/YASim/Rotorpart.hpp
index 05b945b37..8d68fa98f 100644
--- a/src/FDM/YASim/Rotorpart.hpp
+++ b/src/FDM/YASim/Rotorpart.hpp
@@ -69,7 +69,7 @@ namespace yasim {
         void setAlpha0(float f);
         void setAlpha0factor(float f);
         void setLen(float value);
-        void setParameter(char *parametername, float value);
+        void setParameter(const char *parametername, float value);
         void setRotor(Rotor *rotor);
         void setTorqueOfInertia(float toi);
         void writeInfo(std::ostringstream &buffer);