diff --git a/mainwindow.cpp b/mainwindow.cpp
index 288ce5f..d22ba5b 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -690,16 +690,16 @@ void MainWindow::checkSDStatus()
     if(sdWatcher.isFinished() && sdprinting) injectCommand("M27");
 }
 
-void MainWindow::on_stepspin_valueChanged(double arg1)
+void MainWindow::on_stepspin_valueChanged(const QString &arg1)
 {
-    if(arg1 < 1) ui->stepspin->setSingleStep(0.1);
-    else if(arg1 >=10) ui->stepspin->setSingleStep(10);
-    else if((int)arg1 >= 1) ui->stepspin->setSingleStep(1);
+    if(arg1.toFloat() < 1) ui->stepspin->setSingleStep(0.1);
+    else if(arg1.toFloat() >=10) ui->stepspin->setSingleStep(10);
+    else if(arg1.toFloat() >= 1) ui->stepspin->setSingleStep(1);
 }
 
-void MainWindow::on_estepspin_valueChanged(double arg1)
+void MainWindow::on_estepspin_valueChanged(const QString &arg1)
 {
-    if(arg1 < 1l) ui->estepspin->setSingleStep(0.1);
-    else if(arg1 >=10) ui->estepspin->setSingleStep(10);
-    else if((int)arg1 >= 1) ui->estepspin->setSingleStep(1);
+    if(arg1.toFloat() < 1) ui->estepspin->setSingleStep(0.1);
+    else if(arg1.toFloat() >=10) ui->estepspin->setSingleStep(10);
+    else if(arg1.toFloat() >= 1) ui->estepspin->setSingleStep(1);
 }
diff --git a/mainwindow.h b/mainwindow.h
index 52c10cb..5448555 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -120,9 +120,9 @@ private slots:
     void checkSDStatus();
     void updateSDStatus();
 
-    void on_stepspin_valueChanged(double arg1);
+    void on_stepspin_valueChanged(const QString &arg1);
 
-    void on_estepspin_valueChanged(double arg1);
+    void on_estepspin_valueChanged(const QString &arg1);
 
 signals:
     void sdReady();