diff --git a/include/eda_item.h b/include/eda_item.h
index 5f71bda8df..59f65688e7 100644
--- a/include/eda_item.h
+++ b/include/eda_item.h
@@ -186,7 +186,7 @@ public:
     /**
      * Populate \a aList of #MSG_PANEL_ITEM objects with it's internal state for display
      * purposes.
-     *
+     * @param aFrame is the EDA_DRAW_FRAME that displays the message panel
      * @param aList is the list to populate.
      */
     virtual void GetMsgPanelInfo( EDA_DRAW_FRAME* aFrame, std::vector<MSG_PANEL_ITEM>& aList )
diff --git a/include/units_provider.h b/include/units_provider.h
index 9d86fc8859..1c6572deb2 100644
--- a/include/units_provider.h
+++ b/include/units_provider.h
@@ -62,6 +62,8 @@ public:
      *
      * @param aValue = value in internal units
      * @param aAddUnitLabel = true to add symbol unit to the string value
+     * @param aType is the type of this value, and controls the way the value is converted
+     * to a string, and the suitable unit
      * @return A wxString object containing value and optionally the symbol unit (like 2.000 mm)
      */
     wxString StringFromValue( double aValue, bool aAddUnitLabel = false,
@@ -101,6 +103,8 @@ public:
     /**
      * Converts \a aTextValue in \a aUnits to internal units used by the frame.
      * @warning This utilizes the current locale and will break if decimal formats differ
+     * @param aType is the type of this value, and controls the way the string is converted
+     * to a value
      *
      * @param aTextValue A reference to a wxString object containing the string to convert.
      * @return internal units value
diff --git a/pcbnew/drc/drc_test_provider.h b/pcbnew/drc/drc_test_provider.h
index 87e0e40044..a7a23140d4 100644
--- a/pcbnew/drc/drc_test_provider.h
+++ b/pcbnew/drc/drc_test_provider.h
@@ -69,7 +69,7 @@ public:
 
 /**
  * Represent a DRC "provider" which runs some DRC functions over a #BOARD and spits out
- * #DRC_ITEMs and positions as needed.
+ * #DRC_ITEM and positions as needed.
  */
 class DRC_TEST_PROVIDER : public UNITS_PROVIDER
 {
diff --git a/pcbnew/tools/tool_event_utils.h b/pcbnew/tools/tool_event_utils.h
index b444e695bf..07f0623578 100644
--- a/pcbnew/tools/tool_event_utils.h
+++ b/pcbnew/tools/tool_event_utils.h
@@ -55,7 +55,7 @@ namespace TOOL_EVT_UTILS
      * direction indicated by a rotation action event
      *
      * @param aFrame the PCB edit frame to use to get the base rotation step value from
-     * @param aEvt the tool event - should be a rotation action event and should have a rotation
+     * @param aEvent the tool event - should be a rotation action event and should have a rotation
      *                              multiplier parameter
      *
      * @return the clockwise rotation angle