diff --git a/usr/lib/archboot/installer/mountpoints.sh b/usr/lib/archboot/installer/mountpoints.sh
index 625bdf47e..7af287624 100644
--- a/usr/lib/archboot/installer/mountpoints.sh
+++ b/usr/lib/archboot/installer/mountpoints.sh
@@ -333,7 +333,7 @@ _mountpoints() {
     # disable swap and all mounted devices
     _umountall
     _printk off
-    _MAX_COUNT=$(wc -l /tmp/.parts)
+    _MAX_COUNT=$(wc -l < /tmp/.parts)
     _PROGRESS_COUNT=$((100/_MAX_COUNT))
     _COUNT=0
     _run_mkfs | _dialog --title " Mountpoints " --no-mouse --gauge "Mountpoints..." 6 75 0