diff --git a/paddle/gserver/layers/FactorizationMachineLayer.h b/paddle/gserver/layers/FactorizationMachineLayer.h
index 85d40fdb1ee39d9e9c644da03a0a584e2342963c..85ac175657c35fd5a266cc914f788d624d4a591e 100644
--- a/paddle/gserver/layers/FactorizationMachineLayer.h
+++ b/paddle/gserver/layers/FactorizationMachineLayer.h
@@ -61,7 +61,7 @@ private:
   MatrixPtr inputMulFactor_;
   // Temporary calculation result store
   MatrixPtr tmpOut_;
-  MatrixPrt tmpSum_;
+  MatrixPtr tmpSum_;
   // Negative identity matrix
   MatrixPtr negOnes_;