milestone update in ground_2 and basic_2A

[helm.git] / matita / matita / contribs / lambdadelta / basic_2A / substitution / drop_append.ma

diff --git a/matita/matita/contribs/lambdadelta/basic_2A/substitution/drop_append.ma b/matita/matita/contribs/lambdadelta/basic_2A/substitution/drop_append.ma
index 49d734ceaebd0ccc355ef2a7e7c4b7d993dd86e7..8aa5a2527548dd8609376e3c0fc9b6bd74e85eae 100644 (file)
--- a/matita/matita/contribs/lambdadelta/basic_2A/substitution/drop_append.ma
+++ b/matita/matita/contribs/lambdadelta/basic_2A/substitution/drop_append.ma
@@ -12,6 +12,7 @@
 (*                                                                        *)
 (**************************************************************************)
 
+include "ground_2/lib/arith_2a.ma".
 include "basic_2A/grammar/lenv_append.ma".
 include "basic_2A/substitution/drop.ma".