diff --git a/src/collection/algorithms/betweenness-centrality.js b/src/collection/algorithms/betweenness-centrality.js
index 980f59fb2..a803ca23a 100644
--- a/src/collection/algorithms/betweenness-centrality.js
+++ b/src/collection/algorithms/betweenness-centrality.js
@@ -27,7 +27,7 @@ var elesfn = ({
     var V = this.nodes();
     var A = {};
     var _C = {};
-    var max;
+    var max = 0;
     var C = {
       set: function( key, val ){
         _C[ key ] = val;
@@ -165,6 +165,9 @@ var elesfn = ({
       },
 
       betweennessNormalized: function( node ){
+        if ( max == 0 )
+          return 0;
+
         if( is.string( node ) ){
           var node = cy.filter( node ).id();
         } else {
diff --git a/src/collection/algorithms/closeness-centrality.js b/src/collection/algorithms/closeness-centrality.js
index 6aa6b5dd0..7e2f43971 100644
--- a/src/collection/algorithms/closeness-centrality.js
+++ b/src/collection/algorithms/closeness-centrality.js
@@ -47,6 +47,9 @@ var elesfn = ({
 
     return {
       closeness: function( node ){
+		if( maxCloseness == 0 )
+			return 0;
+
         if( is.string( node ) ){
           // from is a selector string
           var node = (cy.filter( node )[0]).id();
diff --git a/src/collection/algorithms/degree-centrality.js b/src/collection/algorithms/degree-centrality.js
index 06186405d..e22817e7b 100644
--- a/src/collection/algorithms/degree-centrality.js
+++ b/src/collection/algorithms/degree-centrality.js
@@ -36,6 +36,9 @@ var elesfn = ({
 
       return {
         degree: function( node ){
+          if( maxDegree == 0 )
+            return 0;
+
           if( is.string( node ) ){
             // from is a selector string
             var node = (cy.filter( node )[0]).id();
@@ -70,6 +73,9 @@ var elesfn = ({
 
       return {
         indegree: function( node ){
+          if ( maxIndegree == 0 )
+            return 0;
+
           if( is.string( node ) ){
             // from is a selector string
             var node = (cy.filter( node )[0]).id();
@@ -81,6 +87,9 @@ var elesfn = ({
           return indegrees[ node ] / maxIndegree;
         },
         outdegree: function( node ){
+          if ( maxOutdegree == 0 )
+            return 0;
+
           if( is.string( node ) ){
             // from is a selector string
             var node = (cy.filter( node )[0]).id();