diff --git a/autoload/tpipeline/parse.vim b/autoload/tpipeline/parse.vim
index 357d8f1..0d84717 100644
--- a/autoload/tpipeline/parse.vim
+++ b/autoload/tpipeline/parse.vim
@@ -36,7 +36,7 @@ def Parse(opt: string): string
 		elseif first ==# 'v'
 			return string(virtcol('.'))
 		elseif first ==# 'p'
-			return tpipeline#util#percentage()
+			return string(tpipeline#util#percentage())
 		elseif first ==# 'P'
 			return tpipeline#util#percentage() .. '%'
 		elseif first ==# '='