diff --git a/cs677/pa2/threaded.cc b/cs677/pa2/threaded.cc
index 15e24b1..0bd40b1 100644
--- a/cs677/pa2/threaded.cc
+++ b/cs677/pa2/threaded.cc
@@ -88,6 +88,8 @@ int main(int argc, char * argv[])
     if (file_to_read != 2)
         usage(argv[0]);
 
+    s = &files[0];
+    t = &files[1];
     pthread_t * threads = new pthread_t[num_threads];
     matrix = new int[files[0].size() * files[1].size()];
     pthread_barrier_init(&barrier, NULL, num_threads);