diff --git a/ganttzk/src/main/resources/web/js/ganttz/dependency.js b/ganttzk/src/main/resources/web/js/ganttz/dependency.js
index e0df24898..0072f9bc3 100644
--- a/ganttzk/src/main/resources/web/js/ganttz/dependency.js
+++ b/ganttzk/src/main/resources/web/js/ganttz/dependency.js
@@ -6,10 +6,6 @@
  */
 zkDependency = {};
 
-zkDependency.END_START = "END_START";
-zkDependency.START_START = "START_START";
-zkDependency.END_END = "END_END";
-
 zkDependency.origin = function(dependency) {
 	var id = dependency.getAttribute("idTaskOrig");
 	return document.getElementById(id);
@@ -31,10 +27,10 @@ zkDependency.draw = function(dependency) {
 	if (separation > 0) {
 		offsetX = offsetX - separation;
 	}
-	if (dependency.getAttribute('type') == zkDependency.END_START
+	if (dependency.getAttribute('type') == zkPlanner.constants.END_START
 			|| dependency.getAttribute('type') == null) {
 		orig[0] = orig[0] + Math.max(0, offsetX);
-	} else if (dependency.getAttribute('type') == zkDependency.END_END) {
+	} else if (dependency.getAttribute('type') == zkPlanner.constants.END_END) {
 		orig[0] = orig[0] + this.origin(dependency).offsetWidth;
 		dest[0] = dest[0] + this.destination(dependency).offsetWidth;
 	}
diff --git a/ganttzk/src/main/resources/web/js/ganttz/planner.js b/ganttzk/src/main/resources/web/js/ganttz/planner.js
index 65ccf7a24..e7878b8f7 100644
--- a/ganttzk/src/main/resources/web/js/ganttz/planner.js
+++ b/ganttzk/src/main/resources/web/js/ganttz/planner.js
@@ -53,6 +53,11 @@ function ScrollSync(element){
  * @author Lorenzo Tilve Álvaro <ltilve@igalia.com>
  */
 zkPlanner = {};
+zkPlanner.constants = {
+    END_START: "END_START",
+    START_START: "START_START",
+    END_END: "END_END"
+};
 
 zkPlanner.getImagesDir = function() {
     return webapp_context_path + "/zkau/web/ganttz/img/";
@@ -107,13 +112,13 @@ zkPlanner.setupArrow = function(arrowDiv){
 zkPlanner.drawArrow = function(dependency, orig, dest) {
 	switch(dependency.getAttribute('type'))
     {
-	case zkDependency.START_START:
+	case zkPlanner.constants.START_START:
 		zkPlanner.drawArrowStartStart(dependency, orig, dest);
 		break;
-	case zkDependency.END_END:
+	case zkPlanner.constants.END_END:
 		zkPlanner.drawArrowEndEnd(dependency, orig, dest);
 		break;
-	case zkDependency.END_START:
+	case zkPlanner.constants.END_START:
 	default:
 		zkPlanner.drawArrowEndStart(dependency, orig, dest);
     }