diff --git a/Sim/Scan/AlphaScan.h b/Sim/Scan/AlphaScan.h
index 5d5bad413b2e79eb533629e8c2e1bcbee47688fb..39f241415ca02b047d2721e8090e5af65f27c052 100644
--- a/Sim/Scan/AlphaScan.h
+++ b/Sim/Scan/AlphaScan.h
@@ -26,13 +26,13 @@ class IScanResolution;
 //! Features footprint correction.
 class AlphaScan : public ISpecularScan {
 public:
-    AlphaScan(double wl, const IAxis& inc_angle);
+    AlphaScan(double wavelength, const IAxis& inc_angle);
     //! Sets angle-defined specular scan. The first parameter is always a wavelength in nm.
     //! Second parameter is either a numpy array of incident angles in radians or an IAxis object
     //! with angle values. Alternatively an axis can be defined in-place, then
     //! the second passed parameter is the number of bins, third - minimum on-axis angle value,
     //! fourth - maximum on-axis  angle value.
-    AlphaScan(double wl, int nbins, double alpha_i_min, double alpha_i_max);
+    AlphaScan(double wavelength, int nbins, double alpha_i_min, double alpha_i_max);
     ~AlphaScan() override;
     AlphaScan* clone() const override;