diff --git a/src/Gui/propertyeditor/PropertyItem.cpp b/src/Gui/propertyeditor/PropertyItem.cpp
index 3eed1ade82..9871334e74 100644
--- a/src/Gui/propertyeditor/PropertyItem.cpp
+++ b/src/Gui/propertyeditor/PropertyItem.cpp
@@ -373,8 +373,11 @@ void PropertyItem::setPropertyName(const QString& name)
     for (int i=0; i<name.length(); i++) {
         if (name[i].isUpper() && !display.isEmpty()) {
             // if there is a sequence of capital letters do not insert spaces
-            if (!upper)
-                display += QLatin1String(" ");
+            if (!upper) {
+                QChar last = display.at(display.length()-1);
+                if (!last.isSpace())
+                    display += QLatin1String(" ");
+            }
         }
         upper = name[i].isUpper();
         display += name[i];