diff --git a/src/meshlab/stdpardialog.cpp b/src/meshlab/stdpardialog.cpp
index d8efcca1d..93ecc77a0 100644
--- a/src/meshlab/stdpardialog.cpp
+++ b/src/meshlab/stdpardialog.cpp
@@ -166,7 +166,7 @@ void MeshlabStdDialog::loadFrameContent(MeshDocument *mdPt)
     QPushButton *applyButton = new QPushButton("Apply", qf);
     QPushButton *defaultButton = new QPushButton("Default", qf);
     applyButton->setFocus();
-#ifdef Q_WS_MAC
+#ifdef Q_OS_MAC
     // Hack needed on mac for correct sizes of button in the bottom of the dialog.
     helpButton->setMinimumSize(100, 25);
     closeButton->setMinimumSize(100,25);
diff --git a/src/meshlab/xmlstdpardialog.cpp b/src/meshlab/xmlstdpardialog.cpp
index e20bf8d45..baa9ae975 100644
--- a/src/meshlab/xmlstdpardialog.cpp
+++ b/src/meshlab/xmlstdpardialog.cpp
@@ -71,7 +71,7 @@ void MeshLabXMLStdDialog::loadFrameContent( )
     applyButton->setFocus();
     bool onlyimportant = true;
     connect(this->parentWidget(),SIGNAL(filterExecuted()),this,SLOT(postFilterExecution()));
-#ifdef Q_WS_MAC
+#ifdef Q_OS_MAC
     // Hack needed on mac for correct sizes of button in the bottom of the dialog.
     helpButton->setMinimumSize(100, 25);
     closeButton->setMinimumSize(100,25);