diff --git a/src/sand-wedge-data/mygeometry.cc b/src/sand-wedge-data/mygeometry.cc
index 6a22bf8150f8385d22dcb843398358b5924f356b..da25425846678e1b8a1ded2d2b9ba4850b10f39f 100644
--- a/src/sand-wedge-data/mygeometry.cc
+++ b/src/sand-wedge-data/mygeometry.cc
@@ -16,7 +16,7 @@ double MyGeometry::verticalProjection(LocalVector const &x) {
   return zenith * x;
 }
 double MyGeometry::horizontalProjection(LocalVector const &x) {
-  return rotatedZenith * x;
+  return orthogonalZenith * x;
 }
 
 void MyGeometry::write() {
diff --git a/src/sand-wedge-data/mygeometry.hh b/src/sand-wedge-data/mygeometry.hh
index eea24864ca0f11a6c6bd26066eff1ea1e0ebbb6f..25ef5027cd08ce392d8b0ccf2c94d781e0317921 100644
--- a/src/sand-wedge-data/mygeometry.hh
+++ b/src/sand-wedge-data/mygeometry.hh
@@ -60,7 +60,7 @@ namespace reference {
   LocalVector2D const I = createVector(Y[0] + G[0], Y[1] + G[1]);
 
   LocalVector2D const zenith = createVector(0, 1);
-  LocalVector2D const rotatedZenith = createVector(-1, 0);
+  LocalVector2D const orthogonalZenith = createVector(-1, 0);
 
   LocalMatrix2D const rotation =
       createMatrix(std::cos(leftAngle), -std::sin(leftAngle),
@@ -95,8 +95,7 @@ LocalVector const Y = rotate(reference::Y);
 LocalVector const Z = rotate(reference::Z);
 
 LocalVector const zenith = rotate(reference::zenith);
-LocalVector const rotatedZenith =
-    rotate(reference::rotatedZenith); // FIXME: misnomer
+LocalVector const orthogonalZenith = rotate(reference::orthogonalZenith);
 
 double verticalProjection(LocalVector const &);
 double horizontalProjection(LocalVector const &);