diff --git a/src/libcalamares/PythonJob.cpp b/src/libcalamares/PythonJob.cpp
index 62fa3477d..68233b492 100644
--- a/src/libcalamares/PythonJob.cpp
+++ b/src/libcalamares/PythonJob.cpp
@@ -42,7 +42,7 @@ BOOST_PYTHON_MODULE( libcalamares )
     bp::scope().attr( "version" ) = CALAMARES_VERSION;
     bp::scope().attr( "shortVersion" ) = CALAMARES_VERSION_SHORT;
 
-    bp::class_< CalamaresPython::PythonJobInterface >( "job", bp::init< const Calamares::PythonJob* >() )
+    bp::class_< CalamaresPython::PythonJobInterface >( "job", bp::init< Calamares::PythonJob* >() )
         .def_readonly( "prettyName", &CalamaresPython::PythonJobInterface::prettyName )
         .def_readonly( "workingPath", &CalamaresPython::PythonJobInterface::workingPath )
         .def_readonly( "configuration", &CalamaresPython::PythonJobInterface::configuration )
@@ -150,9 +150,9 @@ PythonJob::exec()
 
 
 void
-PythonJob::emitProgress( double progressValue ) const
+PythonJob::emitProgress( qreal progressValue )
 {
-    //emit progress( progressValue );
+    emit progress( progressValue );
 }
 
 
diff --git a/src/libcalamares/PythonJob.h b/src/libcalamares/PythonJob.h
index 11a572b45..7e056a970 100644
--- a/src/libcalamares/PythonJob.h
+++ b/src/libcalamares/PythonJob.h
@@ -47,7 +47,7 @@ public:
 private:
     friend class CalamaresPython::Helper;
     friend class CalamaresPython::PythonJobInterface;
-    void emitProgress( double progressValue ) const;
+    void emitProgress( double progressValue );
 
     CalamaresPython::Helper* helper();
     QString m_scriptFile;
diff --git a/src/libcalamares/PythonJobApi.cpp b/src/libcalamares/PythonJobApi.cpp
index 0d88a66c0..179f8146b 100644
--- a/src/libcalamares/PythonJobApi.cpp
+++ b/src/libcalamares/PythonJobApi.cpp
@@ -23,7 +23,7 @@
 namespace CalamaresPython
 {
 
-PythonJobInterface::PythonJobInterface( const Calamares::PythonJob* parent )
+PythonJobInterface::PythonJobInterface( Calamares::PythonJob* parent )
     : m_parent( parent )
 {
     prettyName = m_parent->prettyName().toStdString();
@@ -33,7 +33,7 @@ PythonJobInterface::PythonJobInterface( const Calamares::PythonJob* parent )
 
 
 void
-PythonJobInterface::setprogress( double progress )
+PythonJobInterface::setprogress( qreal progress )
 {
     if ( progress >= 0 && progress <= 1 )
         m_parent->emitProgress( progress );
diff --git a/src/libcalamares/PythonJobApi.h b/src/libcalamares/PythonJobApi.h
index 916f475a6..ff42c04d4 100644
--- a/src/libcalamares/PythonJobApi.h
+++ b/src/libcalamares/PythonJobApi.h
@@ -32,17 +32,17 @@ namespace CalamaresPython
 class PythonJobInterface
 {
 public:
-    explicit PythonJobInterface( const Calamares::PythonJob* parent );
+    explicit PythonJobInterface( Calamares::PythonJob* parent );
 
     std::string prettyName;
     std::string workingPath;
 
     boost::python::dict configuration;
 
-    void setprogress( double progress );
+    void setprogress( qreal progress );
 
 private:
-    const Calamares::PythonJob* m_parent;
+    Calamares::PythonJob* m_parent;
 };
 
 }