diff --git a/rtengine/iptransform.cc b/rtengine/iptransform.cc
index 8aa471c0b..6cda1bba2 100644
--- a/rtengine/iptransform.cc
+++ b/rtengine/iptransform.cc
@@ -524,17 +524,16 @@ bool ImProcFunctions::transCoord (int W, int H, const std::vector<Coord2D> &src,
         x_d /= params->perspective.camera_scale;
         y_d /= params->perspective.camera_scale;
         if (params->perspective.camera_defish) {
-            const double focal_source =
+            const double focal =
                     params->perspective.camera_focal_length *
                     maxRadius *
                     focal_length_in_px_factor *
                     params->perspective.camera_crop_factor;
-            double focal_dst = focal_source;
-            x_d /= focal_dst;
-            y_d /= focal_dst;
+            x_d /= focal;
+            y_d /= focal;
 
             const double r = std::sqrt(x_d * x_d + y_d * y_d);
-            const double factor = focal_source * std::atan(r) / r;
+            const double factor = focal * std::atan(r) / r;
 
             x_d *= factor;
             y_d *= factor;
@@ -1268,17 +1267,16 @@ void ImProcFunctions::transformGeneral(bool highQuality, Imagefloat *original, I
             x_d /= params->perspective.camera_scale;
             y_d /= params->perspective.camera_scale;
             if (params->perspective.camera_defish) {
-                const double focal_source =
+                const double focal =
                         params->perspective.camera_focal_length *
                         maxRadius *
                         focal_length_in_px_factor *
                         params->perspective.camera_crop_factor;
-                double focal_dst = focal_source;
-                x_d /= focal_dst;
-                y_d /= focal_dst;
+                x_d /= focal;
+                y_d /= focal;
 
                 const double r = std::sqrt(x_d * x_d + y_d * y_d);
-                const double factor = focal_source * std::atan(r)/r;
+                const double factor = focal * std::atan(r)/r;
 
                 x_d *= factor;
                 y_d *= factor;