diff --git a/python/core/auto_generated/geometry/qgsgeometryutils.sip.in b/python/core/auto_generated/geometry/qgsgeometryutils.sip.in
index 00cac788722..50c46432ad3 100644
--- a/python/core/auto_generated/geometry/qgsgeometryutils.sip.in
+++ b/python/core/auto_generated/geometry/qgsgeometryutils.sip.in
@@ -502,7 +502,7 @@ Averages two angles, correctly handling negative angles and ensuring the result
 %Docstring
 Returns a number representing the closest side of a rectangle defined by /a right,
 ``bottom``, ``left``, ``top`` to the point at (``x``, ``y``), where
-the point may be in ther interior of the rectangle or outside it.
+the point may be in the interior of the rectangle or outside it.
 
 The returned value may be:
 
diff --git a/src/core/geometry/qgsgeometryutils.cpp b/src/core/geometry/qgsgeometryutils.cpp
index ade16a1d304..14af3ed00a7 100644
--- a/src/core/geometry/qgsgeometryutils.cpp
+++ b/src/core/geometry/qgsgeometryutils.cpp
@@ -638,14 +638,14 @@ void QgsGeometryUtils::perpendicularOffsetPointAlongSegment( double x1, double y
   const double mY = y1 + ( y2 - y1 ) * proportion;
   const double pX = x1 - x2;
   const double pY = y1 - y2;
-  double normalX = -pY;
+  double normalX = -pY;  //#spellok
   double normalY = pX;
-  const double normalLength = sqrt( ( normalX * normalX ) + ( normalY * normalY ) );
-  normalX /= normalLength;
+  const double normalLength = sqrt( ( normalX * normalX ) + ( normalY * normalY ) );  //#spellok
+  normalX /= normalLength;  //#spellok
   normalY /= normalLength;
 
   *x = mX + offset * normalX;
-  *y = mY + offset * normalY;
+  *y = mY + offset * normalY;  //#spellok
 }
 
 QgsPoint QgsGeometryUtils::interpolatePointOnArc( const QgsPoint &pt1, const QgsPoint &pt2, const QgsPoint &pt3, double distance )
diff --git a/src/core/geometry/qgsgeometryutils.h b/src/core/geometry/qgsgeometryutils.h
index 9713d9a5577..e8b4358f827 100644
--- a/src/core/geometry/qgsgeometryutils.h
+++ b/src/core/geometry/qgsgeometryutils.h
@@ -550,7 +550,7 @@ class CORE_EXPORT QgsGeometryUtils
     /**
      * Returns a number representing the closest side of a rectangle defined by /a right,
      * \a bottom, \a left, \a top to the point at (\a x, \a y), where
-     * the point may be in ther interior of the rectangle or outside it.
+     * the point may be in the interior of the rectangle or outside it.
      *
      * The returned value may be:
      *