diff --git a/src/lib/preferences/preferences.ui b/src/lib/preferences/preferences.ui
index e1d1b11a9..497660c7d 100644
--- a/src/lib/preferences/preferences.ui
+++ b/src/lib/preferences/preferences.ui
@@ -656,7 +656,7 @@
          </property>
          <widget class="QWidget" name="tabsBehaviourPage">
           <attribute name="title">
-           <string>Tabs behavior</string>
+           <string>Tabs behaviour</string>
           </attribute>
           <layout class="QVBoxLayout" name="verticalLayout_2">
            <item>
@@ -779,7 +779,7 @@
          </widget>
          <widget class="QWidget" name="addressBarBehaviourPage">
           <attribute name="title">
-           <string>Address Bar behavior</string>
+           <string>Address Bar behaviour</string>
           </attribute>
           <layout class="QVBoxLayout" name="verticalLayout_3">
            <item>
diff --git a/src/lib/tools/html5permissions/html5permissionsdialog.ui b/src/lib/tools/html5permissions/html5permissionsdialog.ui
index a6cfa8cf2..9b482d9d5 100644
--- a/src/lib/tools/html5permissions/html5permissionsdialog.ui
+++ b/src/lib/tools/html5permissions/html5permissionsdialog.ui
@@ -42,7 +42,7 @@
          </column>
          <column>
           <property name="text">
-           <string>Behavior</string>
+           <string>Behaviour</string>
           </property>
          </column>
         </widget>
@@ -96,7 +96,7 @@
          </column>
          <column>
           <property name="text">
-           <string>Behavior</string>
+           <string>Behaviour</string>
           </property>
          </column>
         </widget>