diff --git a/README.md b/README.md
index f2c1e27..70ecb7a 100644
--- a/README.md
+++ b/README.md
@@ -107,7 +107,7 @@ The options are as follows:
    the specific order to compile the ASN.1 files where the first
    tuple-element is one of `wildcard` | `file` | `dir` and the second
    the filename in string format. Defaults to
-   `[{wildcard, \"**/*.asn1\"}]`.
+   `[{wildcard, \"**/*.{asn1,asn}\"}]`.
  * `--overrides -O` An Erlang term consisting of a tuple-list of the
    compile options that will override the options per file. The first
    tuple-element is one of `file` | `re` and the second the filename
diff --git a/src/provider_asn1_clean.erl b/src/provider_asn1_clean.erl
index 6354a96..b79ec5e 100644
--- a/src/provider_asn1_clean.erl
+++ b/src/provider_asn1_clean.erl
@@ -48,10 +48,10 @@ do_clean(State, AppPath) ->
     IncludePath = filename:join(AppPath, "include"),
     SrcPath = filename:join(AppPath, "src"),
 
-    Asns = filelib:wildcard("**/*.asn1", AsnPath),
+    Asns = filelib:wildcard("**/*.{asn1,asn}", AsnPath),
     lists:foreach(
         fun(AsnFile) ->
-            Base = filename:basename(AsnFile, ".asn1"),
+            Base = provider_asn1_util:asn_basename(AsnFile),
             provider_asn1_util:delete_file(State, SrcPath, Base ++ ".erl"),
             provider_asn1_util:delete_file(State, IncludePath, Base ++ ".hrl")
         end, Asns),
diff --git a/src/provider_asn1_compile.erl b/src/provider_asn1_compile.erl
index 0213b95..7e74684 100644
--- a/src/provider_asn1_compile.erl
+++ b/src/provider_asn1_compile.erl
@@ -6,7 +6,7 @@
 -define(PROVIDER, 'compile').
 -define(DEPS, [{default, app_discovery}]).
 -define(DEFAULTS, [{verbose, false}, {encoding, ber}, {compile_opts, []},
-                   {compile_order, [{wildcard, "**/*.asn1"}]}]).
+                   {compile_order, [{wildcard, "**/*.{asn1,asn}"}]}]).
 
 %% ===================================================================
 %% Public API
@@ -110,7 +110,7 @@ process_app(State, AppPath) ->
 move_asns(State, GenPath, SrcPath, IncludePath, Asns) ->
     lists:foreach(
       fun(AsnFile) ->
-              Base = filename:basename(AsnFile, ".asn1"),
+              Base = provider_asn1_util:asn_basename(AsnFile),
               provider_asn1_util:move_file(State, GenPath, Base ++ ".erl", SrcPath),
               provider_asn1_util:delete_file(State, GenPath, Base ++ ".asn1db"),
               provider_asn1_util:move_file(State, GenPath, Base ++ ".hrl", IncludePath)
@@ -158,7 +158,7 @@ find_asn_files(State, BasePath) ->
                                [filename:join(BasePath, File)];
                            ({dir, Dir}) ->
                                D = filename:join(BasePath, Dir),
-                               [filename:join(D, F) || F <- filelib:wildcard("*.asn1", D)]
+                               [filename:join(D, F) || F <- filelib:wildcard("*.{asn1,asn}", D)]
                        end, Order),
     uniq(Fs).
 
@@ -177,7 +177,7 @@ uniq(Fs) ->
 
 is_latest(ASNFileName, ASNPath, GenPath) ->
     Source = filename:join(ASNPath, ASNFileName),
-    TargetFileName = filename:basename(ASNFileName, ".asn1") ++ ".erl",
+    TargetFileName = provider_asn1_util:asn_basename(ASNFileName) ++ ".erl",
     Target = filename:join(GenPath, TargetFileName),
     filelib:last_modified(Source) > filelib:last_modified(Target).
 
diff --git a/src/provider_asn1_util.erl b/src/provider_asn1_util.erl
index 5c090c1..9f7a932 100644
--- a/src/provider_asn1_util.erl
+++ b/src/provider_asn1_util.erl
@@ -7,7 +7,9 @@
          resolve_args/2,
          get_args/1,
          get_arg/2,
-         set_arg/3]).
+         set_arg/3,
+         asn_basename/1
+        ]).
 
 verbose_out(State, FormatString, Args)->
     CommArgs = get_args(State),
@@ -71,3 +73,6 @@ set_arg(State, Key, Val) ->
     Args = rebar_state:get(State, asn1_args, []),
     ArgsMap = maps:from_list(Args),
     rebar_state:set(State, asn1_args, maps:to_list(maps:put(Key, Val, ArgsMap))).
+
+asn_basename(ASNFileName) ->
+    filename:basename(filename:basename(filename:basename(ASNFileName, ".asn1"), ".asn"), ".set").