diff --git a/common/dialog_shim.cpp b/common/dialog_shim.cpp
index 0c96d81eca..b919fb6deb 100644
--- a/common/dialog_shim.cpp
+++ b/common/dialog_shim.cpp
@@ -339,7 +339,7 @@ static void selectAllInTextCtrls( wxWindowList& children )
             {
                 // Respect an existing selection
             }
-            else
+            else if( childTextCtrl->IsEditable() )
             {
                 childTextCtrl->SelectAll();
             }
@@ -353,7 +353,7 @@ static void selectAllInTextCtrls( wxWindowList& children )
             {
                 // Respect an existing selection
             }
-            else if( !scintilla->GetText().Contains( wxT( "\n") ) )
+            else if( scintilla->IsEditable() )
             {
                 scintilla->SelectAll();
             }
diff --git a/eeschema/tools/simulator_control.cpp b/eeschema/tools/simulator_control.cpp
index 0822b86d1d..87c575c445 100644
--- a/eeschema/tools/simulator_control.cpp
+++ b/eeschema/tools/simulator_control.cpp
@@ -375,6 +375,8 @@ public:
 
         textCtrl->SetLexer( wxSTC_LEX_SPICE );
 
+        textCtrl->SetEditable( false );
+
         wxBoxSizer* sizer = new wxBoxSizer( wxVERTICAL );
         sizer->Add( textCtrl, 1, wxEXPAND | wxALL, 5 );
         SetSizer( sizer );