diff --git a/qucs-filter/qucsfilter.cpp b/qucs-filter/qucsfilter.cpp
index 6e5517bd..9364e622 100644
--- a/qucs-filter/qucsfilter.cpp
+++ b/qucs-filter/qucsfilter.cpp
@@ -40,6 +40,7 @@
 #include "qucsfilter.h"
 #include "helpdialog.h"
 #include "material_props.h"
+#include "../qucs/extsimkernels/spicecompat.h"
 
 QucsFilter::QucsFilter()
 {
diff --git a/qucs-filter/qucsfilter.h b/qucs-filter/qucsfilter.h
index 299f8e31..d7f2a2c2 100644
--- a/qucs-filter/qucsfilter.h
+++ b/qucs-filter/qucsfilter.h
@@ -30,9 +30,9 @@ class QLabel;
 class QIntValidator;
 class QDoubleValidator;
 
-namespace spicecompat {
-    enum Simulator {simNgspice = 0, simXyceSer = 1, simXycePar = 2, simSpiceOpus = 3, simQucsator = 4, simNotSpecified=10};
-}
+//namespace spicecompat {
+//    enum Simulator {simNgspice = 0, simXyceSer = 1, simXycePar = 2, simSpiceOpus = 3, simQucsator = 4, simNotSpecified=10};
+//}
 
 struct tQucsSettings {
   int x, y;      // position of main window
diff --git a/qucs-powercombining/main.cpp b/qucs-powercombining/main.cpp
index a4ccc906..8df5a88e 100644
--- a/qucs-powercombining/main.cpp
+++ b/qucs-powercombining/main.cpp
@@ -23,6 +23,7 @@
 
 #include <QApplication>
 #include "qucspowercombiningtool.h"
+#include "../qucs/extsimkernels/spicecompat.h"
 
 struct tQucsSettings QucsSettings;
 
diff --git a/qucs-powercombining/qucspowercombiningtool.h b/qucs-powercombining/qucspowercombiningtool.h
index 48289440..07db9653 100644
--- a/qucs-powercombining/qucspowercombiningtool.h
+++ b/qucs-powercombining/qucspowercombiningtool.h
@@ -29,9 +29,9 @@
 #include <QSvgWidget>
 #include <QDebug>
 
-namespace spicecompat {
-    enum Simulator {simNgspice = 0, simXyceSer = 1, simXycePar = 2, simSpiceOpus = 3, simQucsator = 4, simNotSpecified=10};
-}
+//namespace spicecompat {
+//    enum Simulator {simNgspice = 0, simXyceSer = 1, simXycePar = 2, simSpiceOpus = 3, simQucsator = 4, simNotSpecified=10};
+//}
 
 struct tQucsSettings {
   int x, y;      // position of main window
diff --git a/qucs/extsimkernels/simsettingsdialog.cpp b/qucs/extsimkernels/simsettingsdialog.cpp
index 944c7a0b..9a71bc45 100644
--- a/qucs/extsimkernels/simsettingsdialog.cpp
+++ b/qucs/extsimkernels/simsettingsdialog.cpp
@@ -189,8 +189,8 @@ void SimSettingsDialog::slotApply()
 
 void SimSettingsDialog::slotCancel()
 {
-    if (QucsSettings.DefaultSimulator == spicecompat::simNotSpecified)
-    QucsSettings.DefaultSimulator = spicecompat::simQucsator;
+    //if (QucsSettings.DefaultSimulator == spicecompat::simNotSpecified)
+    //QucsSettings.DefaultSimulator = spicecompat::simQucsator;
     reject();
 }