diff --git a/src/musredit_qt5/mupp/plotter/PMuppCanvas.cpp b/src/musredit_qt5/mupp/plotter/PMuppCanvas.cpp
index 3fa1f91ff..b815121f8 100644
--- a/src/musredit_qt5/mupp/plotter/PMuppCanvas.cpp
+++ b/src/musredit_qt5/mupp/plotter/PMuppCanvas.cpp
@@ -30,6 +30,7 @@
 #include <cstdlib>
 #include <iostream>
 #include <fstream>
+#include <cmath>
 
 #include <TColor.h>
 #include <TROOT.h>