diff --git a/src/optionstr.c b/src/optionstr.c
index d218d56..7dfb7b7 100644
--- a/src/optionstr.c
+++ b/src/optionstr.c
@@ -587,7 +587,7 @@
 	if (!*s)
 	    break;
 	s++;
-	if (*s == '%' || *s == STL_TRUNCMARK || *s == STL_MIDDLEMARK)
+	if (*s == '%' || *s == STL_TRUNCMARK || *s == STL_SEPARATE)
 	{
 	    s++;
 	    continue;