diff --git a/src/Gui/ExpressionBinding.cpp b/src/Gui/ExpressionBinding.cpp
index f6ad623b4c..d90e0dedfb 100644
--- a/src/Gui/ExpressionBinding.cpp
+++ b/src/Gui/ExpressionBinding.cpp
@@ -37,6 +37,7 @@
 #include <App/DocumentObject.h>
 #include <App/Expression.h>
 #include <App/ObjectIdentifier.h>
+#include <App/PropertyGeo.h>
 #include <Base/Tools.h>
 
 
@@ -167,6 +168,28 @@ std::string ExpressionBinding::getEscapedExpressionString() const
     return Base::Tools::escapedUnicodeFromUtf8(getExpressionString(false).c_str());
 }
 
+bool ExpressionBinding::assignToProperty(const std::string & propName, double value)
+{
+    if (isBound()) {
+        const App::ObjectIdentifier & path = getPath();
+        const Property * prop = path.getProperty();
+
+        /* Skip update if property is bound and we know it is read-only */
+        if (prop && prop->isReadOnly())
+            return true;
+
+        if (prop && prop->getTypeId().isDerivedFrom(App::PropertyPlacement::getClassTypeId())) {
+            std::string p = path.getSubPathStr();
+            if (p == ".Rotation.Angle") {
+                value = Base::toRadians(value);
+            }
+        }
+    }
+
+    Gui::Command::doCommand(Gui::Command::Doc, "%s = %f", propName.c_str(), value);
+    return true;
+}
+
 QPixmap ExpressionBinding::getIcon(const char* name, const QSize& size) const
 {
     QString key = QString::fromLatin1("%1_%2x%3")
diff --git a/src/Gui/ExpressionBinding.h b/src/Gui/ExpressionBinding.h
index d7454fb577..bf59eec898 100644
--- a/src/Gui/ExpressionBinding.h
+++ b/src/Gui/ExpressionBinding.h
@@ -65,6 +65,7 @@ protected:
     std::shared_ptr<App::Expression> getExpression() const;
     std::string getExpressionString(bool no_throw=true) const;
     std::string getEscapedExpressionString() const;
+    bool assignToProperty(const std::string & propName, double);
     virtual void setExpression(std::shared_ptr<App::Expression> expr);
 
     //gets called when the bound expression is changed, either by this binding or any external action
diff --git a/src/Gui/QuantitySpinBox.cpp b/src/Gui/QuantitySpinBox.cpp
index 845508eb58..22039421b8 100644
--- a/src/Gui/QuantitySpinBox.cpp
+++ b/src/Gui/QuantitySpinBox.cpp
@@ -39,7 +39,6 @@
 #include <App/Document.h>
 #include <App/DocumentObject.h>
 #include <App/ExpressionParser.h>
-#include <App/PropertyGeo.h>
 #include <Base/Exception.h>
 #include <Base/UnitsApi.h>
 #include <Base/Tools.h>
@@ -370,24 +369,7 @@ bool QuantitySpinBox::apply(const std::string & propName)
 {
     if (!ExpressionBinding::apply(propName)) {
         double dValue = value().getValue();
-        if (isBound()) {
-            const App::ObjectIdentifier & path = getPath();
-            const Property * prop = path.getProperty();
-
-            /* Skip update if property is bound and we know it is read-only */
-            if (prop && prop->isReadOnly())
-                return true;
-
-            if (prop && prop->getTypeId().isDerivedFrom(App::PropertyPlacement::getClassTypeId())) {
-                std::string p = path.getSubPathStr();
-                if (p == ".Rotation.Angle") {
-                    dValue = Base::toRadians(dValue);
-                }
-            }
-        }
-
-        Gui::Command::doCommand(Gui::Command::Doc, "%s = %f", propName.c_str(), dValue);
-        return true;
+        return assignToProperty(propName, dValue);
     }
 
     return false;