diff --git a/lib/elixir/lib/io.ex b/lib/elixir/lib/io.ex
index b9080a05ad..aba500d73a 100644
--- a/lib/elixir/lib/io.ex
+++ b/lib/elixir/lib/io.ex
@@ -317,7 +317,7 @@ defmodule IO do
   @spec warn(chardata | String.Chars.t(), Exception.stacktrace()) :: :ok
   def warn(message, []) do
     message = [to_chardata(message), ?\n]
-    :elixir_errors.io_warn(nil, nil, message, message)
+    :elixir_errors.io_warn(0, nil, message, message)
   end
 
   def warn(message, [{_, _, _, opts} | _] = stacktrace) do
@@ -327,7 +327,7 @@ defmodule IO do
     file = opts[:file]
 
     :elixir_errors.io_warn(
-      line,
+      line || 0,
       file && List.to_string(file),
       message,
       [message, ?\n, "  ", formatted_trace, ?\n]
diff --git a/lib/elixir/lib/module/checker.ex b/lib/elixir/lib/module/checker.ex
index 2ae8ff0a2d..3cff67b6e8 100644
--- a/lib/elixir/lib/module/checker.ex
+++ b/lib/elixir/lib/module/checker.ex
@@ -221,7 +221,7 @@ defmodule Module.Checker do
 
   defp warn(meta, state, warning) do
     {fun, arity} = state.function
-    location = {state.file, meta[:line], {state.module, fun, arity}}
+    location = {state.file, meta[:line] || 0, {state.module, fun, arity}}
     %{state | warnings: [{__MODULE__, warning, location} | state.warnings]}
   end
 
@@ -308,7 +308,7 @@ defmodule Module.Checker do
 
   defp format_file_line(file, line) do
     file = Path.relative_to_cwd(file)
-    line = if line, do: [?: | Integer.to_string(line)], else: []
+    line = if line > 0, do: [?: | Integer.to_string(line)], else: []
     ["  ", file, line]
   end
 
diff --git a/lib/elixir/src/elixir_dispatch.erl b/lib/elixir/src/elixir_dispatch.erl
index 7196af0df7..577023f22f 100644
--- a/lib/elixir/src/elixir_dispatch.erl
+++ b/lib/elixir/src/elixir_dispatch.erl
@@ -92,7 +92,7 @@ dispatch_import(Meta, Name, Args, E, Callback) ->
     {ok, Receiver, Quoted} ->
       expand_quoted(Meta, Receiver, Name, Arity, Quoted, E);
     {ok, Receiver, NewName, NewArgs} ->
-      elixir_expand:expand({{'.', [], [Receiver, NewName]}, Meta, NewArgs}, E);
+      elixir_expand:expand({{'.', Meta, [Receiver, NewName]}, Meta, NewArgs}, E);
     error ->
       Callback()
   end.
diff --git a/lib/elixir/src/elixir_errors.erl b/lib/elixir/src/elixir_errors.erl
index c74902a6e1..29b0efd589 100644
--- a/lib/elixir/src/elixir_errors.erl
+++ b/lib/elixir/src/elixir_errors.erl
@@ -16,8 +16,8 @@ erl_warn(Line, File, Warning) when is_integer(Line), is_binary(File) ->
   io_warn(Line, File, Warning, [Warning, "\n  ", file_format(Line, File), $\n]).
 
 %% Low-level warning, all other warnings are built on top of it.
--spec io_warn(non_neg_integer() | nil, unicode:chardata() | nil, unicode:chardata(), unicode:chardata()) -> ok.
-io_warn(Line, File, LogMessage, PrintMessage) when is_integer(Line) or (Line == nil), is_binary(File) or (File == nil) ->
+-spec io_warn(non_neg_integer(), unicode:chardata() | nil, unicode:chardata(), unicode:chardata()) -> ok.
+io_warn(Line, File, LogMessage, PrintMessage) when is_integer(Line), is_binary(File) or (File == nil) ->
   send_warning(Line, File, LogMessage),
   print_warning(PrintMessage).
 
diff --git a/lib/elixir/test/elixir/kernel/expansion_test.exs b/lib/elixir/test/elixir/kernel/expansion_test.exs
index de61d336ba..125274dd29 100644
--- a/lib/elixir/test/elixir/kernel/expansion_test.exs
+++ b/lib/elixir/test/elixir/kernel/expansion_test.exs
@@ -654,8 +654,8 @@ defmodule Kernel.ExpansionTest do
         expand(quote(do: [1] ++ 2 ++ [3] = [1, 2, 3]))
       end
 
-      assert {:=, _, [-1, {{:., [], [:erlang, :-]}, _, [1]}]} = expand(quote(do: -1 = -1))
-      assert {:=, _, [1, {{:., [], [:erlang, :+]}, _, [1]}]} = expand(quote(do: +1 = +1))
+      assert {:=, _, [-1, {{:., _, [:erlang, :-]}, _, [1]}]} = expand(quote(do: -1 = -1))
+      assert {:=, _, [1, {{:., _, [:erlang, :+]}, _, [1]}]} = expand(quote(do: +1 = +1))
 
       assert {:=, _, [[{:|, _, [1, [{:|, _, [2, 3]}]]}], [1, 2, 3]]} =
                expand(quote(do: [1] ++ [2] ++ 3 = [1, 2, 3]))
diff --git a/lib/elixir/test/elixir/module/checker_test.exs b/lib/elixir/test/elixir/module/checker_test.exs
index 7805047cd2..dacbf5576f 100644
--- a/lib/elixir/test/elixir/module/checker_test.exs
+++ b/lib/elixir/test/elixir/module/checker_test.exs
@@ -639,6 +639,31 @@ defmodule Module.CheckerTest do
       assert_warnings(files, warning)
     end
 
+    test "reports imported functions" do
+      files = %{
+        "a.ex" => """
+        defmodule A do
+          @deprecated "oops"
+          def a, do: :ok
+        end
+        """,
+        "b.ex" => """
+        defmodule B do
+          import A
+          def b, do: a()
+        end
+        """
+      }
+
+      warning = """
+      warning: A.a/0 is deprecated. oops
+        b.ex:3: B.b/0
+
+      """
+
+      assert_warnings(files, warning)
+    end
+
     test "reports structs" do
       files = %{
         "a.ex" => """