diff --git a/src/algorithm/extrude.h b/src/algorithm/extrude.h
index 40d8fe38..7eadddec 100644
--- a/src/algorithm/extrude.h
+++ b/src/algorithm/extrude.h
@@ -38,9 +38,9 @@ struct NoValidityCheck;
  * @brief Returns a Geometry equal to the specified Geometry,
  *   extruded by the specified displacement.
  * @param g The specified Geometry.
- * @param dx The component of the specified dispalcement in
+ * @param dx The component of the specified displacement in
  *   the x-direction.
- * @param dy The component of the specified dispalcement in
+ * @param dy The component of the specified displacement in
  *   the y-direction.
  * @param dz The component of the specified dispalcement in
  *   the z-direction.
@@ -64,11 +64,11 @@ SFCGAL_API std::unique_ptr< Geometry > extrude( const Geometry& g
  * @brief Returns a Geometry equal to the specified Geometry,
  *   extruded by the specified displacement.
  * @param g The specified Geometry.
- * @param dx The component of the specified dispalcement in
+ * @param dx The component of the specified displacement in
  *   the x-direction.
- * @param dy The component of the specified dispalcement in
+ * @param dy The component of the specified displacement in
  *   the y-direction.
- * @param dz The component of the specified dispalcement in
+ * @param dz The component of the specified displacement in
  *   the z-direction.
  * @param nvc A NoValidityCheck object.
  * @return A Geometry equal to g extruded by the displacement
@@ -93,11 +93,11 @@ SFCGAL_API std::unique_ptr< Geometry > extrude( const Geometry& g
  * @brief Returns a Geometry equal to the specified Geometry,
  *   extruded by the specified displacement.
  * @param g The specified Geometry.
- * @param dx The component of the specified dispalcement in
+ * @param dx The component of the specified displacement in
  *   the x-direction.
- * @param dy The component of the specified dispalcement in
+ * @param dy The component of the specified displacement in
  *   the y-direction.
- * @param dz The component of the specified dispalcement in
+ * @param dz The component of the specified displacement in
  *   the z-direction.
  * @return A Geometry equal to g extruded by the displacement
  *   vector {dx, dy, dz}.
@@ -120,7 +120,7 @@ SFCGAL_API std::unique_ptr< Geometry > extrude( const Geometry& g
  * @brief Returns a Geometry equal to the specified Geometry,
  *   extruded by the specified displacement vector.
  * @param g The specified Geometry.
- * @param v The specified dispalcement vector.
+ * @param v The specified displacement vector.
  * @return A Geometry equal to g extruded by the displacement
  *   vector v.
  * @pre g must be a valid geometry.