diff --git a/src/konqcombo.cpp b/src/konqcombo.cpp
--- a/src/konqcombo.cpp
+++ b/src/konqcombo.cpp
@@ -305,7 +305,7 @@
 {
     // No need to flicker
     if (itemText(index) == t &&
-            (!itemIcon(index).isNull() && itemIcon(index).pixmap(iconSize()).serialNumber() == pix.serialNumber())) {
+            (!itemIcon(index).isNull() && itemIcon(index).pixmap(iconSize()).cacheKey() == pix.cacheKey())) {
         return;
     }