diff --git a/substance/src/main/java/org/pushingpixels/substance/internal/ui/SubstanceInternalFrameUI.java b/substance/src/main/java/org/pushingpixels/substance/internal/ui/SubstanceInternalFrameUI.java
index f0195946..783875b0 100755
--- a/substance/src/main/java/org/pushingpixels/substance/internal/ui/SubstanceInternalFrameUI.java
+++ b/substance/src/main/java/org/pushingpixels/substance/internal/ui/SubstanceInternalFrameUI.java
@@ -98,9 +98,7 @@ protected JComponent createNorthPane(JInternalFrame w) {
 
     @Override
     protected void installComponents() {
-        if (!SubstanceCoreUtilities.isRoundedCorners(frame)) {
-            frame.setOpaque(false);
-        }
+        frame.setOpaque(!SubstanceCoreUtilities.isRoundedCorners(frame));
         super.installComponents();
     }
 
@@ -151,9 +149,7 @@ public void propertyChange(PropertyChangeEvent evt) {
                 } else if (SubstanceLookAndFeel.WINDOW_ROUNDED_CORNERS.equals(propertyName)
                         || JInternalFrame.IS_MAXIMUM_PROPERTY.equals(propertyName)) 
                 {
-                    if (!SubstanceCoreUtilities.isRoundedCorners(frame)) {
-                        frame.setOpaque(false);
-                    }
+                    frame.setOpaque(!SubstanceCoreUtilities.isRoundedCorners(frame));
                 }
 			}
 		};