diff --git a/src/Mod/PartDesign/Gui/TaskPadParameters.cpp b/src/Mod/PartDesign/Gui/TaskPadParameters.cpp
index 437f8b411b3b..4189144e1546 100644
--- a/src/Mod/PartDesign/Gui/TaskPadParameters.cpp
+++ b/src/Mod/PartDesign/Gui/TaskPadParameters.cpp
@@ -107,6 +107,9 @@ void TaskPadParameters::onModeChanged(int index)
         break;
     case Modes::TwoDimensions:
         pcPad->Type.setValue("TwoLengths");
+        // symmetric is then not possible
+        if (ui->checkBoxMidplane->isChecked())
+            ui->checkBoxMidplane->setChecked(false);
         break;
     }
 
diff --git a/src/Mod/PartDesign/Gui/TaskPocketParameters.cpp b/src/Mod/PartDesign/Gui/TaskPocketParameters.cpp
index 069d258348a6..6cbe8cb40b29 100644
--- a/src/Mod/PartDesign/Gui/TaskPocketParameters.cpp
+++ b/src/Mod/PartDesign/Gui/TaskPocketParameters.cpp
@@ -118,6 +118,9 @@ void TaskPocketParameters::onModeChanged(int index)
         case Modes::TwoDimensions:
             oldLength = pcPocket->Length.getValue();
             pcPocket->Type.setValue("TwoLengths");
+            // symmetric is then not possible
+            if (ui->checkBoxMidplane->isChecked())
+                ui->checkBoxMidplane->setChecked(false);
             break;
     }