diff --git a/GUI/Model/Detector/DetectorItem.cpp b/GUI/Model/Detector/DetectorItem.cpp
index a0e34a5cb95333af9c633cbac4cdb9246fe3443c..b1253fbd1611e1d704e87332d264749e9210087e 100644
--- a/GUI/Model/Detector/DetectorItem.cpp
+++ b/GUI/Model/Detector/DetectorItem.cpp
@@ -48,17 +48,11 @@ const QMap<FlatDetector::NominalNormal, QString> alignment_names_map = {
     {FlatDetector::T, "Perpendicular to direct beam"},
     {FlatDetector::R, "Perpendicular to reflected beam"}};
 
-void initResolutionFunction(ResolutionFunctionItem* newFunc, const ResolutionFunctionItem*)
-{
-    newFunc->setUnit("mm");
-}
-
 } // namespace
 
 DetectorItem::DetectorItem()
 {
-    m_resolutionFunction.initWithInitializer("Resolution function", "Detector resolution function",
-                                             initResolutionFunction);
+    m_resolutionFunction.init("Resolution function", "Detector resolution function");
 
     m_xSize = 100;
     m_ySize = 100;
diff --git a/GUI/Model/Detector/ResolutionFunctionItemCatalog.cpp b/GUI/Model/Detector/ResolutionFunctionItemCatalog.cpp
index 2c68080b704b6f73621d6cb6e9aab169340bd730..755c40f40d97b6dbb57e6f54b247f758362e5e92 100644
--- a/GUI/Model/Detector/ResolutionFunctionItemCatalog.cpp
+++ b/GUI/Model/Detector/ResolutionFunctionItemCatalog.cpp
@@ -17,19 +17,13 @@
 #include "GUI/Model/Detector/ResolutionFunctionItems.h"
 
 ResolutionFunctionItem*
-ResolutionFunctionItemCatalog::create(Type type, const std::variant<QString, Unit>& unit)
+ResolutionFunctionItemCatalog::create(Type type)
 {
     switch (type) {
-    case Type::None: {
-        auto* p = new ResolutionFunctionNoneItem();
-        p->setUnit(unit);
-        return p;
-    }
-    case Type::Gaussian: {
-        auto* p = new ResolutionFunction2DGaussianItem();
-        p->setUnit(unit);
-        return p;
-    }
+    case Type::None:
+        return new ResolutionFunctionNoneItem();
+    case Type::Gaussian:
+        return new ResolutionFunction2DGaussianItem();
     }
     ASSERT_NEVER;
 }
diff --git a/GUI/Model/Detector/ResolutionFunctionItemCatalog.h b/GUI/Model/Detector/ResolutionFunctionItemCatalog.h
index 91e1c18c1b265fd30b95afb628cf86ae951b1911..45cf47637718482c01b05ac2659809e8fe42cfe6 100644
--- a/GUI/Model/Detector/ResolutionFunctionItemCatalog.h
+++ b/GUI/Model/Detector/ResolutionFunctionItemCatalog.h
@@ -16,9 +16,7 @@
 #define BORNAGAIN_GUI_MODEL_DETECTOR_RESOLUTIONFUNCTIONITEMCATALOG_H
 
 #include "GUI/Support/Type/UiInfo.h"
-#include "GUI/Support/Type/Unit.h"
 #include <QVector>
-#include <variant>
 
 class ResolutionFunctionItem;
 
@@ -31,8 +29,7 @@ public:
     enum class Type : uint8_t { None = 0, Gaussian = 1 };
 
     //! Creates the item of the given type.
-    static ResolutionFunctionItem* create(Type type,
-                                          const std::variant<QString, Unit>& unit = Unit::unitless);
+    static ResolutionFunctionItem* create(Type type);
 
     //! List of available types, sorted as expected in the UI.
     static QVector<Type> types();
diff --git a/GUI/Model/Detector/ResolutionFunctionItems.cpp b/GUI/Model/Detector/ResolutionFunctionItems.cpp
index 62968d19015a77848c2dbaefa2d0b078f349d487..a4fa014a773f052b0d635a76eb6bb3908040ddb3 100644
--- a/GUI/Model/Detector/ResolutionFunctionItems.cpp
+++ b/GUI/Model/Detector/ResolutionFunctionItems.cpp
@@ -45,12 +45,6 @@ ResolutionFunction2DGaussianItem::createResolutionFunction(double scale) const
     return std::make_unique<ResolutionFunction2DGaussian>(scale * m_sigmaX, scale * m_sigmaY);
 }
 
-void ResolutionFunction2DGaussianItem::setUnit(const std::variant<QString, Unit>& unit)
-{
-    m_sigmaX.setUnit(unit);
-    m_sigmaY.setUnit(unit);
-}
-
 void ResolutionFunction2DGaussianItem::writeTo(QXmlStreamWriter* w) const
 {
     XML::writeAttribute(w, XML::Attrib::version, uint(1));
diff --git a/GUI/Model/Detector/ResolutionFunctionItems.h b/GUI/Model/Detector/ResolutionFunctionItems.h
index 66de6c92523633f902e169d527144b5dcd01c692..582938c851a734a78b78222088968e2c1b495563 100644
--- a/GUI/Model/Detector/ResolutionFunctionItems.h
+++ b/GUI/Model/Detector/ResolutionFunctionItems.h
@@ -28,9 +28,6 @@ public:
     virtual std::unique_ptr<IResolutionFunction2D>
     createResolutionFunction(double scale = 1.0) const = 0;
 
-    //! Set the unit of the distributed value
-    virtual void setUnit(const std::variant<QString, Unit>&) {}
-
     virtual void writeTo(QXmlStreamWriter*) const {}
     virtual void readFrom(QXmlStreamReader*) {}
 };
@@ -47,8 +44,6 @@ public:
     std::unique_ptr<IResolutionFunction2D>
     createResolutionFunction(double scale = 1.0) const override;
 
-    void setUnit(const std::variant<QString, Unit>& unit) override;
-
     void writeTo(QXmlStreamWriter* w) const override;
     void readFrom(QXmlStreamReader* r) override;