diff --git a/Base/Util/ConversionUtil.cpp b/Base/Util/ConversionUtil.cpp
index f7d67c63b2832de360f36933fdf1c35c63129133..e40e7b1135fcbb2b68ebe163abd6925cfbefc384 100644
--- a/Base/Util/ConversionUtil.cpp
+++ b/Base/Util/ConversionUtil.cpp
@@ -13,16 +13,15 @@
 //  ************************************************************************************************
 
 #include "Base/Util/ConversionUtil.h"
-#include "Base/Util/Assert.h"
 #include <cmath>
 #include <numbers>
 
-/* rad */ double Conversion::Refl::qz2alpha(double lambda /* nm */, double qz /* 1/nm */)
+double Convert::Refl::qz2alpha(double lambda, double qz)
 {
-    return std::asin(qz * lambda / 4.0 / std::numbers::pi);
+    return std::asin(qz * lambda / 4 / std::numbers::pi);
 }
 
-/* nm */ double Conversion::Refl::qz2lambda(double alpha /* rad */, double qz /* 1/nm */)
+double Convert::Refl::qz2lambda(double alpha, double qz)
 {
-    return 4.0 * std::numbers::pi * std::sin(alpha) / qz;
+    return 4 * std::numbers::pi * std::sin(alpha) / qz;
 }
diff --git a/Base/Util/ConversionUtil.h b/Base/Util/ConversionUtil.h
index 3e00da341de7c4ace4bdadd5ca7a3cbc4edf21a3..caa4f497641c00b0ab5dd3e66253470997ecb3b2 100644
--- a/Base/Util/ConversionUtil.h
+++ b/Base/Util/ConversionUtil.h
@@ -15,12 +15,12 @@
 #ifndef BORNAGAIN_BASE_UTIL_CONVERSIONUTIL_H
 #define BORNAGAIN_BASE_UTIL_CONVERSIONUTIL_H
 
-namespace Conversion::Refl {
+namespace Convert::Refl {
 
 double qz2alpha(double lambda, double qz);
 
 double qz2lambda(double alpha, double qz);
 
-} // namespace Conversion::Refl
+} // namespace Convert::Refl
 
 #endif // BORNAGAIN_BASE_UTIL_CONVERSIONUTIL_H
diff --git a/GUI/Model/Device/InstrumentItems.cpp b/GUI/Model/Device/InstrumentItems.cpp
index 4fdd0c41ba32fa39d6685ef0369b073d9a7d6619..5569bdcea404b194e54314df30c65e91a40b5309 100644
--- a/GUI/Model/Device/InstrumentItems.cpp
+++ b/GUI/Model/Device/InstrumentItems.cpp
@@ -416,7 +416,7 @@ Frame SpecularInstrumentItem::makeFrame() const
         if (pAxis->unit() == "1/nm") {
             double l = scanItem()->wavelength();
             Scale ax = pAxis->transformedScale(Coordinate("alpha_i", "rad").label(), [l](double x) {
-                return Conversion::Refl::qz2alpha(l, x);
+                return Convert::Refl::qz2alpha(l, x);
             });
             return Frame(std::move(ax.clone()));
         }