diff --git a/layout-custom.c b/layout-custom.c
index 5e1d2ce2..85ae0a65 100644
--- a/layout-custom.c
+++ b/layout-custom.c
@@ -207,7 +207,7 @@ layout_construct(struct layout_cell *lcparent, const char **layout)
 
 	if (!isdigit((u_char) **layout))
 		return (NULL);
-	if (sscanf(*layout, "%ux%u,%u,%u,%*u", &sx, &sy, &xoff, &yoff) != 5 &&
+	if (sscanf(*layout, "%ux%u,%u,%u,%*u", &sx, &sy, &xoff, &yoff) != 4 &&
 	    sscanf(*layout, "%ux%u,%u,%u", &sx, &sy, &xoff, &yoff) != 4)
 		return (NULL);