diff --git a/containment.h b/containment.h
index 80e6aec3c..82b1ea753 100644
--- a/containment.h
+++ b/containment.h
@@ -424,7 +424,7 @@ class PLASMA_EXPORT Containment : public Applet
     public Q_SLOTS:
         /**
          * Informs the Corona as to what position it is in. This is informational
-         * only, as the Corona doesn't change it's actual location. This is,
+         * only, as the Corona doesn't change its actual location. This is,
          * however, passed on to Applets that may be managed by this Corona.
          *
          * @param location the new location of this Corona
diff --git a/extender.h b/extender.h
index c05a9ac21..e59f3b167 100644
--- a/extender.h
+++ b/extender.h
@@ -163,7 +163,7 @@ class PLASMA_EXPORT Extender : public QGraphicsWidget
         bool isEmpty() const;
 
         /**
-         * Use this function to instruct the extender on how to render it's items. Usually you will
+         * Use this function to instruct the extender on how to render its items. Usually you will
          * want to call this function in your applet's constraintsEvent, allthough this is already
          * done for you when using PopupApplet as base class for your applet. Defaults to NoBorders.
          * @param appearance the way this extender should look.
@@ -233,8 +233,8 @@ class PLASMA_EXPORT Extender : public QGraphicsWidget
         /**
          * This function get's called on every item to determine which background border's to
          * render.
-         * @param item the item for which it's position or extender has changed.
-         * @return the borders that have to be enabled on it's background.
+         * @param item the item for which its position or extender has changed.
+         * @return the borders that have to be enabled on its background.
          */
         virtual FrameSvg::EnabledBorders enabledBordersForItem(ExtenderItem *item) const;
 
diff --git a/extenderitem.h b/extenderitem.h
index 182b853f0..5cfdcdac3 100644
--- a/extenderitem.h
+++ b/extenderitem.h
@@ -203,7 +203,7 @@ class PLASMA_EXPORT ExtenderItem : public QGraphicsWidget
         uint autoExpireDelay() const;
 
         /**
-         * @return whether or not this item is detached from it's original source.
+         * @return whether or not this item is detached from its original source.
          */
         bool isDetached() const;
 
diff --git a/private/extenderapplet_p.h b/private/extenderapplet_p.h
index fb3274b06..7346deffe 100644
--- a/private/extenderapplet_p.h
+++ b/private/extenderapplet_p.h
@@ -28,7 +28,7 @@ namespace Plasma
 /**
  * This class is used as a 'host' for detached extender items. When an extender item is dropped
  * somewhere, this applet is added at the location where the item is dropped, and the item is added
- * to it's extender.
+ * to its extender.
  */
 class ExtenderApplet : public Plasma::PopupApplet
 {