diff --git a/rogueviz-cvl.cpp b/rogueviz-cvl.cpp
index 9e6822fb..ef3a8537 100644
--- a/rogueviz-cvl.cpp
+++ b/rogueviz-cvl.cpp
@@ -52,26 +52,26 @@ int readArgs() {
     if(!f) { shift(); printf("failed to open file\n"); return 0; }
     int id;
     lineinfo l0;    
-    fscanf(f, "%d%d%d", &id, &l0.plus_matrices, &l0.minus_matrices);
+    ignore(fscanf(f, "%d%d%d", &id, &l0.plus_matrices, &l0.minus_matrices));
     l0.locs.push_back(location{View, viewctr});
     for(int i=1; i<l0.plus_matrices; i++)
       l0.locs.push_back(loc_multiply(l0.locs.back(), xpush(1)));
     lines[id] = std::move(l0);
     
     while(true) {
-      fscanf(f, "%d", &id);
+      ignore(fscanf(f, "%d", &id));
       println(hlog, "id=", id, ".");
       if(id < 0) break;
       auto& l1 = lines[id];
       int step;
-      fscanf(f, "%d%d", &id, &step);
+      ignore(fscanf(f, "%d%d", &id, &step));
       transmatrix T;
       double d;
       for(int a=0; a<9; a++) {
-        fscanf(f, "%lf", &d);
+        ignore(fscanf(f, "%lf", &d));
         T[0][a] = d;
         }
-      fscanf(f, "%d%d", &l1.plus_matrices, &l1.minus_matrices);
+      ignore(fscanf(f, "%d%d", &l1.plus_matrices, &l1.minus_matrices));
       auto old = lines[id].locs[step];
       println(hlog, "FROM ", old.lView, old.lviewctr, " id=", id, " step=", step);
       l1.locs.push_back(loc_multiply(old, T));