diff --git a/configure-stormux.sh b/configure-stormux.sh
index 849566b..29504db 100755
--- a/configure-stormux.sh
+++ b/configure-stormux.sh
@@ -34,7 +34,8 @@ fi
 
 # Check for possible resize
 diskSource="$(df --output='source' / | tail -1)"
-diskSize="$(df -h --output='size' / | tail -1 | tr -cd '[:digit:]')"
+diskSize="$(df -h --output='size' / | tail -1 | tr -cd '[:digit:].')"
+diskSize=${diskSize%.*}
 if [[ $diskSize -le 5 ]]; then
     if [[ "$(yesno "$diskSource is only $diskSize gigs, which means it probably needs to be resized. Would you like to do this now?")" == "Yes" ]]; then
         sudo growpartfs $diskSource