diff --git a/LatentFactorModel.cpp b/LatentFactorModel.cpp
index a2d6d3f..205f991 100755
--- a/LatentFactorModel.cpp
+++ b/LatentFactorModel.cpp
@@ -83,6 +83,7 @@ bool LatentFactorModel::init_params(double* v, int size){
         n = sqrt(-2.0 * log(1.0 * rand() / RAND_MAX)) * sin(2.0 * PI * (1.0 * rand() / RAND_MAX));
         v[k] = sigma * n;
     }
+    return (0);
 }
 
 bool LatentFactorModel::dump(string path){
diff --git a/SparseMatrix.cpp b/SparseMatrix.cpp
index f7823e5..5a7bd21 100755
--- a/SparseMatrix.cpp
+++ b/SparseMatrix.cpp
@@ -70,6 +70,7 @@ bool SparseMatrix::set_rating(const string& row, const string& col, double ratin
     rating_list->push_back(rating);
     
     // _kv_dict->insert(pair<pair<int, int>, double>(k, rating));
+    return (0);
 
 }