diff --git a/app/stable/pi/QTSOUND.bapp b/app/stable/pi/QTSOUND.bapp
index 42d4940..3f6490d 100644
--- a/app/stable/pi/QTSOUND.bapp
+++ b/app/stable/pi/QTSOUND.bapp
@@ -14,7 +14,7 @@ INSTALL(){
     	else
     		sudo dpkg --add-architecture armhf
     		sudo apt update
-    		sudo apt install -y libqt5widgets5:armhf libqt5serialport5:armhf libasound2:armhf libasound2-plugins:armhf
+    		sudo apt install -y libqt5widgets5:armhf libqt5serialport5:armhf libasound2:armhf libasound2-plugins:armhf libfftw3-bin:armhf
     	fi
     cd ${HOME}/Downloads || return
     wget --tries 2 --connect-timeout=60 https://www.cantab.net/users/john.wiseman/Downloads/Beta/piQtSoundModem