diff --git a/plugins/samplesource/rtlsdr/rtlsdrgui.cpp b/plugins/samplesource/rtlsdr/rtlsdrgui.cpp
index 4660037c6..5f851add1 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrgui.cpp
+++ b/plugins/samplesource/rtlsdr/rtlsdrgui.cpp
@@ -342,7 +342,7 @@ void RTLSDRGui::on_fcPos_currentIndexChanged(int index)
 
 void RTLSDRGui::on_ppm_valueChanged(int value)
 {
-	if ((value > 99) || (value < -99))
+	if ((value > 200) || (value < -200))
 	{
 		return;
 	}
diff --git a/plugins/samplesource/rtlsdr/rtlsdrgui.ui b/plugins/samplesource/rtlsdr/rtlsdrgui.ui
index 2d0a3aa4c..bdbe8b255 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrgui.ui
+++ b/plugins/samplesource/rtlsdr/rtlsdrgui.ui
@@ -169,7 +169,10 @@
         <string>Local Oscillator ppm correction</string>
        </property>
        <property name="minimum">
-        <number>-99</number>
+        <number>-200</number>
+       </property>
+       <property name="maximum">
+        <number>200</number>
        </property>
        <property name="pageStep">
         <number>1</number>
@@ -660,17 +663,17 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
    <header>gui/valuedial.h</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>ButtonSwitch</class>
-   <extends>QToolButton</extends>
-   <header>gui/buttonswitch.h</header>
-  </customwidget>
   <customwidget>
    <class>TransverterButton</class>
    <extends>QPushButton</extends>