diff --git a/cs677/pa4/maximum-parsimony.cc b/cs677/pa4/maximum-parsimony.cc
index 7ab094b..0dab163 100644
--- a/cs677/pa4/maximum-parsimony.cc
+++ b/cs677/pa4/maximum-parsimony.cc
@@ -61,7 +61,7 @@ int main(int argc, char * argv[])
     MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
     MPI_Comm_size(MPI_COMM_WORLD, &world_size);
 
-    for (int i = 0; i < argc; i++)
+    for (int i = 1; i < argc; i++)
     {
         filename = argv[i];
     }