diff --git a/c3.css b/c3.css
index 29c7e60..4a7f49e 100644
--- a/c3.css
+++ b/c3.css
@@ -96,7 +96,7 @@
 
 /*-- Focus --*/
 
-.c3-target.c3-focused path.c3-line {
+.c3-target.c3-focused path.c3-line, .c3-target.c3-focused path.c3-step {
   stroke-width: 2px;
 }