diff --git a/programs/hash/generic_sum.c b/programs/hash/generic_sum.c
index 3f29058..498039b 100644
--- a/programs/hash/generic_sum.c
+++ b/programs/hash/generic_sum.c
@@ -150,6 +150,8 @@
                 "not match\n", nb_err2, nb_tot2 );
     }
 
+    fclose( f );
+
     return( nb_err1 != 0 || nb_err2 != 0 );
 }