diff --git a/cs677/pa2/threaded.cc b/cs677/pa2/threaded.cc
index 0bd40b1..edca7ca 100644
--- a/cs677/pa2/threaded.cc
+++ b/cs677/pa2/threaded.cc
@@ -96,7 +96,9 @@ int main(int argc, char * argv[])
 
     for (int i = 0; i < num_threads; i++)
     {
-        int ret = pthread_create(&threads[i], NULL, &calcSimMatrixThread, (void *) i);
+        int * arg = new int;
+        *arg = i;
+        int ret = pthread_create(&threads[i], NULL, &calcSimMatrixThread, arg);
         if (ret)
         {
             cerr << "Error " << ret << " when creating thread!" << endl;
@@ -134,7 +136,8 @@ bool readFile(char * fileName, vector<char> & v)
 /* Compute portions of the similarity matrix between two character arrays */
 void * calcSimMatrixThread(void * arg)
 {
-    int id = (int) arg;
+    int * realarg = (int *) arg;
+    int id = *realarg;
     int s_size = s->size();
     int t_size = t->size();
     int (*F)[s_size][t_size] = (int (*) [s_size][t_size]) matrix;
@@ -187,5 +190,6 @@ void * calcSimMatrixThread(void * arg)
     cout << "Maximum value is " << max_val << " at position ("
         << max_x << ", " << max_y << ")" << endl;
 
+    delete realarg;
     return NULL;
 }