diff --git a/lib/qasim/ui/about.ui b/lib/qasim/ui/about.ui
index 11b629e..bc1ab59 100644
--- a/lib/qasim/ui/about.ui
+++ b/lib/qasim/ui/about.ui
@@ -13,6 +13,10 @@
   <property name="windowTitle">
    <string>About</string>
   </property>
+  <property name="windowIcon">
+   <iconset resource="../qasim.qrc">
+    <normaloff>:/qasim/qasim-icon</normaloff>:/qasim/qasim-icon</iconset>
+  </property>
   <property name="sizeGripEnabled">
    <bool>true</bool>
   </property>
diff --git a/lib/qasim/ui/preferences.ui b/lib/qasim/ui/preferences.ui
index 38dd421..1d6360d 100644
--- a/lib/qasim/ui/preferences.ui
+++ b/lib/qasim/ui/preferences.ui
@@ -13,6 +13,10 @@
   <property name="windowTitle">
    <string>Preferences</string>
   </property>
+  <property name="windowIcon">
+   <iconset resource="../qasim.qrc">
+    <normaloff>:/qasim/qasim-icon</normaloff>:/qasim/qasim-icon</iconset>
+  </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <layout class="QVBoxLayout" name="verticalLayout_2">