diff --git a/math/minuit/src/TFitter.cxx b/math/minuit/src/TFitter.cxx
index 855ae136ec0c6..ae07368a80ee3 100644
--- a/math/minuit/src/TFitter.cxx
+++ b/math/minuit/src/TFitter.cxx
@@ -543,7 +543,7 @@ void TFitter::ReleaseParameter(Int_t ipar)
 ////////////////////////////////////////////////////////////////////////////////
 /// Specify the address of the fitting algorithm (from the interpreter)
 
-void TFitter::SetFCN(void *fcn)
+void TFitter::SetFCN(void * /*fcn*/)
 {
    if (fCovar)  {delete [] fCovar; fCovar = 0;}