diff --git a/src/java/org/lwjgl/opengl/Display.java b/src/java/org/lwjgl/opengl/Display.java
index 16b80616..c6a9f0f6 100644
--- a/src/java/org/lwjgl/opengl/Display.java
+++ b/src/java/org/lwjgl/opengl/Display.java
@@ -1092,7 +1092,7 @@ public final class Display {
 				}
 			}
 
-			if(Display.isCreated()) {
+			if (Display.isCreated() && parent == null) {
 				return display_impl.setIcon(cached_icons);
 			} else {
 				return 0;