diff --git a/fdelmodc/writeRec.c b/fdelmodc/writeRec.c
index 6c2ce08a7b4c2ecd1932bed0dafe58c3a5b2c4bf..a12843e2fcd181612fa65e112a9df82da69109e4 100644
--- a/fdelmodc/writeRec.c
+++ b/fdelmodc/writeRec.c
@@ -84,7 +84,7 @@ int writeRec(recPar rec, modPar mod, bndPar bnd, wavPar wav, int ixsrc, int izsr
     hdr.trid   = 1;
     hdr.ns     = nsam;
     hdr.trwf   = rec.n;
-    hdr.ntr    = (ishot+1)*rec.n;
+    hdr.ntr    = rec.n;
     if (mod.grid_dir) { /* reverse time modeling */
         hdr.f1 = (-mod.nt+1)*mod.dt;
     }