diff --git a/src/Gui/InputField.cpp b/src/Gui/InputField.cpp
index a8806713cb..fb0aec5731 100644
--- a/src/Gui/InputField.cpp
+++ b/src/Gui/InputField.cpp
@@ -95,7 +95,7 @@ InputField::InputField(QWidget * parent)
 
     QObject::connect(this, SIGNAL(textChanged(QString)),
                      this, SLOT(newInput(QString)));
-#if FC_OS_WIN32
+#ifdef FC_OS_WIN32
     setLocale(QLocale());
 #endif
 }