diff --git a/src/aeso_ast_infer_types.erl b/src/aeso_ast_infer_types.erl
index 4ef4403..ead0fe6 100644
--- a/src/aeso_ast_infer_types.erl
+++ b/src/aeso_ast_infer_types.erl
@@ -3490,6 +3490,7 @@ pp_type(Label, Type) ->
     prettypr:format(prettypr:beside(prettypr:text(Label), aeso_pretty:type(Type, [show_generated])), 80, 80).
 
 src_file(T)      -> aeso_syntax:get_ann(file, T, no_file).
+include_type(T)  -> aeso_syntax:get_ann(include_type, T, none).
 line_number(T)   -> aeso_syntax:get_ann(line, T, 0).
 column_number(T) -> aeso_syntax:get_ann(col, T, 0).
 
@@ -3497,13 +3498,16 @@ pos(T)    -> aeso_errors:pos(src_file(T), line_number(T), column_number(T)).
 pos(L, C) -> aeso_errors:pos(L, C).
 
 loc(T) ->
-    {line_number(T), column_number(T)}.
+    {src_file(T), include_type(T), line_number(T), column_number(T)}.
 
 pp_loc(T) ->
-    {Line, Col} = loc(T),
+    {File, IncludeType, Line, Col} = loc(T),
     case {Line, Col} of
         {0, 0} -> "(builtin location)";
-        _      -> io_lib:format("line ~p, column ~p", [Line, Col])
+        _      -> case IncludeType of
+                      none -> io_lib:format("line ~p, column ~p", [Line, Col]);
+                      _    -> io_lib:format("line ~p, column ~p in ~s", [Line, Col, File])
+                  end
     end.
 
 plural(No, _Yes, [_]) -> No;
diff --git a/test/aeso_compiler_tests.erl b/test/aeso_compiler_tests.erl
index fa3cb6a..ae4f834 100644
--- a/test/aeso_compiler_tests.erl
+++ b/test/aeso_compiler_tests.erl
@@ -425,9 +425,15 @@ failing_contracts() ->
           "The field `y` is missing when constructing an element of type `r(int)`">>,
         <<?Pos(6, 42)
           "The fields `y`, `z` are missing when constructing an element of type `r('a)`">>])
-    , ?TYPE_ERROR(namespace_clash,
+    , ?TYPE_ERROR(namespace_clash_builtin,
        [<<?Pos(4, 10)
           "The contract `Call` has the same name as a namespace at (builtin location)">>])
+    , ?TYPE_ERROR(namespace_clash_included,
+       [<<?Pos(5, 11)
+          "The namespace `BLS12_381` has the same name as a namespace at line 1, column 11 in BLS12_381.aes">>])
+    , ?TYPE_ERROR(namespace_clash_same_file,
+       [<<?Pos(4, 11)
+          "The namespace `Nmsp` has the same name as a namespace at line 1, column 11">>])
     , ?TYPE_ERROR(bad_events,
         [<<?Pos(9, 25)
            "The indexed type `string` is not a word type">>,
diff --git a/test/contracts/namespace_clash.aes b/test/contracts/namespace_clash_builtin.aes
similarity index 100%
rename from test/contracts/namespace_clash.aes
rename to test/contracts/namespace_clash_builtin.aes
diff --git a/test/contracts/namespace_clash_included.aes b/test/contracts/namespace_clash_included.aes
new file mode 100644
index 0000000..bf2931d
--- /dev/null
+++ b/test/contracts/namespace_clash_included.aes
@@ -0,0 +1,9 @@
+@compiler >= 6
+
+include "BLS12_381.aes"
+
+namespace BLS12_381 =
+    type fp = int
+
+main contract Bug =
+    type number = int
diff --git a/test/contracts/namespace_clash_same_file.aes b/test/contracts/namespace_clash_same_file.aes
new file mode 100644
index 0000000..c969b18
--- /dev/null
+++ b/test/contracts/namespace_clash_same_file.aes
@@ -0,0 +1,8 @@
+namespace Nmsp =
+    type x = int
+
+namespace Nmsp =
+    type y = string
+
+main contract Bug =
+    type number = int