diff --git a/src/declarativeimports/core/units.h b/src/declarativeimports/core/units.h
--- a/src/declarativeimports/core/units.h
+++ b/src/declarativeimports/core/units.h
@@ -217,6 +217,11 @@
 
     void updateDevicePixelRatio();
     void updatePlasmaRCSettings();
+
+    static qreal deviceRatioToIconRatio(const qreal devicePixelRatio);
+    static qreal primaryScreenDevicePixelRatio();
+    static qreal primaryScreenIconPixelRatio();
+
     /**
      * @return The dpi-adjusted size for a given icon size
      */
diff --git a/src/declarativeimports/core/units.cpp b/src/declarativeimports/core/units.cpp
--- a/src/declarativeimports/core/units.cpp
+++ b/src/declarativeimports/core/units.cpp
@@ -155,23 +155,18 @@
 
 int Units::roundToIconSize(int size)
 {
-    /*Do *not* use devicePixelIconSize here, we want to use the sizes of the pixmaps of the smallest icons on the disk. And those are unaffected by dpi*/
     if (size <= 0) {
         return 0;
-    } else if (size < KIconLoader::SizeSmall) {
-        return KIconLoader::SizeSmall/2;
-    } else if (size < KIconLoader::SizeSmallMedium) {
-        return KIconLoader::SizeSmall;
-
-    } else if (size < KIconLoader::SizeMedium) {
-        return KIconLoader::SizeSmallMedium;
-
-    } else if (size < KIconLoader::SizeLarge) {
-        return KIconLoader::SizeMedium;
-
-    } else if (size < KIconLoader::SizeHuge) {
-        return KIconLoader::SizeLarge;
-
+    } else if (size < devicePixelIconSize(KIconLoader::SizeSmall)) {
+        return devicePixelIconSize(KIconLoader::SizeSmall) / 2;
+    } else if (size < devicePixelIconSize(KIconLoader::SizeSmallMedium)) {
+        return devicePixelIconSize(KIconLoader::SizeSmall);
+    } else if (size < devicePixelIconSize(KIconLoader::SizeMedium)) {
+        return devicePixelIconSize(KIconLoader::SizeSmallMedium);
+    } else if (size < devicePixelIconSize(KIconLoader::SizeLarge)) {
+        return devicePixelIconSize(KIconLoader::SizeMedium);
+    } else if (size < devicePixelIconSize(KIconLoader::SizeHuge)) {
+        return devicePixelIconSize(KIconLoader::SizeLarge);
     } else {
         return size;
     }