diff --git a/src/Mod/PartDesign/Gui/TaskChamferParameters.cpp b/src/Mod/PartDesign/Gui/TaskChamferParameters.cpp
index d4e489ffd..42c770871 100644
--- a/src/Mod/PartDesign/Gui/TaskChamferParameters.cpp
+++ b/src/Mod/PartDesign/Gui/TaskChamferParameters.cpp
@@ -121,7 +121,11 @@ TaskDlgChamferParameters::~TaskDlgChamferParameters()
 
 void TaskDlgChamferParameters::open()
 {
-
+    // a transaction is already open at creation time of the chamfer
+    if (!Gui::Command::hasPendingCommand()) {
+        QString msg = tr("Edit chamfer");
+        Gui::Command::openCommand((const char*)msg.toUtf8());
+    }
 }
 
 void TaskDlgChamferParameters::clicked(int)
diff --git a/src/Mod/PartDesign/Gui/TaskFilletParameters.cpp b/src/Mod/PartDesign/Gui/TaskFilletParameters.cpp
index 834a376e5..4ffe01e4d 100644
--- a/src/Mod/PartDesign/Gui/TaskFilletParameters.cpp
+++ b/src/Mod/PartDesign/Gui/TaskFilletParameters.cpp
@@ -121,12 +121,16 @@ TaskDlgFilletParameters::~TaskDlgFilletParameters()
 
 void TaskDlgFilletParameters::open()
 {
-    
+    // a transaction is already open at creation time of the fillet
+    if (!Gui::Command::hasPendingCommand()) {
+        QString msg = tr("Edit fillet");
+        Gui::Command::openCommand((const char*)msg.toUtf8());
+    }
 }
 
 void TaskDlgFilletParameters::clicked(int)
 {
-    
+
 }
 
 bool TaskDlgFilletParameters::accept()