diff --git a/graphx/src/main/scala/org/apache/spark/graphx/lib/PageRank.scala b/graphx/src/main/scala/org/apache/spark/graphx/lib/PageRank.scala
index 614555a054dfb..42c3125c46691 100644
--- a/graphx/src/main/scala/org/apache/spark/graphx/lib/PageRank.scala
+++ b/graphx/src/main/scala/org/apache/spark/graphx/lib/PageRank.scala
@@ -139,7 +139,8 @@ object PageRank extends Logging {
     // version of Pregel
     def vertexProgram(id: VertexId, attr: (Double, Double), msgSum: Double): (Double, Double) = {
       val (oldPR, lastDelta) = attr
-      val newPR = oldPR + (1.0 - resetProb) * msgSum
+      // Equation: resetProb * (1-resetProb)*msgSum
+      val newPR = resetProb + (1.0 - resetProb) * msgSum
       (newPR, newPR - oldPR)
     }