diff --git a/processui/ProcessModel.cpp b/processui/ProcessModel.cpp
--- a/processui/ProcessModel.cpp
+++ b/processui/ProcessModel.cpp
@@ -527,8 +527,10 @@
         return; //We do not have a record of this window and this is not a new window
 
     if(properties == NET::WMIcon) {
-        if(w)
-            w->icon = KWindowSystem::icon(wid, HEADING_X_ICON_SIZE, HEADING_X_ICON_SIZE, true);
+        if(w) {
+            w->icon = KWindowSystem::icon(wid, HEADING_X_ICON_SIZE * qApp->devicePixelRatio(), HEADING_X_ICON_SIZE * qApp->devicePixelRatio(), true);
+            w->icon.setDevicePixelRatio(qApp->devicePixelRatio());
+        }
         return;
     }
     /* Get PID for window */
@@ -550,8 +552,10 @@
         mWIdToWindowInfo.insert(wid, w);
     }
 
-    if(w && (properties & NET::WMIcon))
-        w->icon = KWindowSystem::icon(wid, HEADING_X_ICON_SIZE, HEADING_X_ICON_SIZE, true);
+    if(w && (properties & NET::WMIcon)) {
+        w->icon = KWindowSystem::icon(wid, HEADING_X_ICON_SIZE * qApp->devicePixelRatio(), HEADING_X_ICON_SIZE * qApp->devicePixelRatio(), true);
+        w->icon.setDevicePixelRatio(qApp->devicePixelRatio());
+    }
     if(properties & NET::WMVisibleName && info.visibleName())
         w->name = QString::fromUtf8(info.visibleName());
     else if(properties & NET::WMName)