diff --git a/libraries/AP_Math/polygon.h b/libraries/AP_Math/polygon.h
index ae36ee3a63..3a96fce832 100644
--- a/libraries/AP_Math/polygon.h
+++ b/libraries/AP_Math/polygon.h
@@ -17,6 +17,6 @@
  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-bool Polygon_outside(const Vector2l &P, const Vector2l *V, unsigned n);
-bool Polygon_complete(const Vector2l *V, unsigned n);
+bool        Polygon_outside(const Vector2l &P, const Vector2l *V, unsigned n);
+bool        Polygon_complete(const Vector2l *V, unsigned n);