diff --git a/GnomeScreensaver.cc b/GnomeScreensaver.cc
index 19f0e77..6cf1c6f 100644
--- a/GnomeScreensaver.cc
+++ b/GnomeScreensaver.cc
@@ -150,7 +150,7 @@ gboolean GnomeScreensaver::configureCB(GtkWidget *da, GdkEventConfigure *event)
          m_n_monitors++)
         ;
 
-    m_aspect_ratio = (float)m_width / (float)m_n_monitors / (float)m_height;
+    m_aspect_ratio = (float)m_width / (float)m_height;
 
     gboolean rc = m_configure_callback(*this);
 
diff --git a/modes/Spin.cc b/modes/Spin.cc
index f3c08cf..8783289 100644
--- a/modes/Spin.cc
+++ b/modes/Spin.cc
@@ -29,7 +29,8 @@ bool Spin::configure (GnomeScreensaver & gs)
 {
     glMatrixMode(GL_PROJECTION);
     glLoadIdentity();
-    gluPerspective(60.0, gs.getAspectRatio(), 0.01, 1000.0);
+    gluPerspective(60.0, gs.getAspectRatio() / gs.getNumMonitors(),
+            0.01, 1000.0);
 
     glMatrixMode(GL_MODELVIEW);
     glLoadIdentity();