diff --git a/roofit/roofitcore/src/RooFuncWrapper.cxx b/roofit/roofitcore/src/RooFuncWrapper.cxx
index 2c3c8078d544cabbdadc7e2267f3c6da3b8a8404..6aaa43045fed33f73cf16351e97a8b2632b5835c 100644
--- a/roofit/roofitcore/src/RooFuncWrapper.cxx
+++ b/roofit/roofitcore/src/RooFuncWrapper.cxx
@@ -131,7 +131,7 @@ void RooFuncWrapper::declareAndDiffFunction(std::string funcName, std::string co
    comp = gInterpreter->Declare(requestFuncStrm.str().c_str());
    if (!comp) {
       std::stringstream errorMsg;
-      errorMsg << "Function " << funcName << " could not be be differentiated. See above for details.";
+      errorMsg << "Function " << funcName << " could not be differentiated. See above for details.";
       coutE(InputArguments) << errorMsg.str() << std::endl;
       throw std::runtime_error(errorMsg.str().c_str());
    }