diff --git a/plugins/channelrx/demodwfm/wfmdemodgui.cpp b/plugins/channelrx/demodwfm/wfmdemodgui.cpp
index ae837934f..98bd34d58 100644
--- a/plugins/channelrx/demodwfm/wfmdemodgui.cpp
+++ b/plugins/channelrx/demodwfm/wfmdemodgui.cpp
@@ -24,16 +24,6 @@ const int WFMDemodGUI::m_rfBW[] = {
 };
 const int WFMDemodGUI::m_nbRfBW = 14;
 
-int requiredBW(int rfBW)
-{
-	if (rfBW <= 48000)
-		return 48000;
-	else if (rfBW < 100000)
-		return 96000;
-	else
-		return 384000;
-}
-
 WFMDemodGUI* WFMDemodGUI::create(PluginAPI* pluginAPI, DeviceSourceAPI *deviceAPI)
 {
 	WFMDemodGUI* gui = new WFMDemodGUI(pluginAPI, deviceAPI);
diff --git a/plugins/channelrx/demodwfm/wfmdemodgui.h b/plugins/channelrx/demodwfm/wfmdemodgui.h
index 97dcba670..947baa0bb 100644
--- a/plugins/channelrx/demodwfm/wfmdemodgui.h
+++ b/plugins/channelrx/demodwfm/wfmdemodgui.h
@@ -73,6 +73,15 @@ private:
 
 	void leaveEvent(QEvent*);
 	void enterEvent(QEvent*);
+
+	static int requiredBW(int rfBW)
+	{
+	    if (rfBW <= 48000) {
+	        return 48000;
+	    } else {
+	        return (3*rfBW)/2;
+	    }
+	}
 };
 
 #endif // INCLUDE_WFMDEMODGUI_H