diff --git a/src/scales/scale.time.js b/src/scales/scale.time.js
index dfd708b2345..2496a487c3e 100644
--- a/src/scales/scale.time.js
+++ b/src/scales/scale.time.js
@@ -22,12 +22,12 @@ var INTERVALS = {
 	second: {
 		common: true,
 		size: 1000,
-		steps: [1, 2, 5, 10, 30]
+		steps: [1, 2, 5, 10, 15, 30]
 	},
 	minute: {
 		common: true,
 		size: 60000,
-		steps: [1, 2, 5, 10, 30]
+		steps: [1, 2, 5, 10, 15, 30]
 	},
 	hour: {
 		common: true,