diff --git a/include/moCapController.h b/include/moCapController.h
index 8fed85f837fc626bb74f2ddc467e0ec6c1fea5e1..e9a83d1712024a56782ec4f0d60029febf2975a0 100644
--- a/include/moCapController.h
+++ b/include/moCapController.h
@@ -28,7 +28,7 @@
 #include "extrCalibration.h"
 #include "moCapPersonMetadata.h"
 
-class SkeletonLine;
+struct SkeletonLine;
 class QDomElement;
 
 struct SegmentRenderData
@@ -43,7 +43,7 @@ public:
 bool operator==(const SegmentRenderData& lhs, const SegmentRenderData& rhs);
 
 /**
- * @brief The MoCapController class controlls the visualisation of MoCap data.
+ * @brief The MoCapController class controls the visualisation of MoCap data.
  *
  * This class coordinates the visualization of motion capturing data. It saves the
  * different parameters of the visualization and transforms the data in MoCapStorage
diff --git a/include/moCapItem.h b/include/moCapItem.h
index ba24028a048282fd3c528cbfd8f9d017b26c4209..9947ef26f1a08f2a6379a7fe07bb6aeed514d261 100644
--- a/include/moCapItem.h
+++ b/include/moCapItem.h
@@ -25,7 +25,7 @@
 class MoCapController;
 class Animation;
 class Petrack;
-class SegmentRenderData;
+struct SegmentRenderData;
 
 /**
  * @brief The MoCapItem class draws stick figures to visalize the MoCap data.
diff --git a/include/moCapPerson.h b/include/moCapPerson.h
index 3b590330f75e9c6e1050c65610bdc3e35269e2fc..4f7406cd20ed58e1c78de7473911076f8862f839 100644
--- a/include/moCapPerson.h
+++ b/include/moCapPerson.h
@@ -59,7 +59,6 @@ public:
     void setXml(QDomElement &elem) const;
 
 private:
-    int mId;
     std::vector<SkeletonTree> mSkeletons;
     MoCapPersonMetadata mMetadata;
 };