diff --git a/src/util/coordinate_calculation.cpp b/src/util/coordinate_calculation.cpp
index 53285a70a..6f37bd627 100644
--- a/src/util/coordinate_calculation.cpp
+++ b/src/util/coordinate_calculation.cpp
@@ -132,8 +132,8 @@ double perpendicularDistanceFromProjectedCoordinate(
     BOOST_ASSERT(query_location.IsValid());
 
     // initialize values
-    const double x = projected_xy_coordinate.first;
-    const double y = projected_xy_coordinate.second;
+    const double x = projected_xy_coordinate.second;
+    const double y = projected_xy_coordinate.first;
     const double a = mercator::latToY(toFloating(segment_source.lat));
     const double b = static_cast<double>(toFloating(segment_source.lon));
     const double c = mercator::latToY(toFloating(segment_target.lat));