diff --git a/tools/lammps-gui/main.cpp b/tools/lammps-gui/main.cpp
index d7e8e66764..4820d48ebb 100644
--- a/tools/lammps-gui/main.cpp
+++ b/tools/lammps-gui/main.cpp
@@ -14,7 +14,6 @@
 #include "lammpsgui.h"
 
 #include <QApplication>
-#include <qconfig-64.h>
 
 #include <cstdio>
 #include <cstring>