diff --git a/lib/postgrex/extensions/box.ex b/lib/postgrex/extensions/box.ex
index f49ff42c..22760cf8 100644
--- a/lib/postgrex/extensions/box.ex
+++ b/lib/postgrex/extensions/box.ex
@@ -13,7 +13,7 @@ defmodule Postgrex.Extensions.Box do
         [<<32::int32()>>, encoded_p1 | encoded_p2]
 
       other ->
-        raise DBConnection.EncodeError, Postgrex.Utils.encode_msg(other, Postgrex.Line)
+        raise DBConnection.EncodeError, Postgrex.Utils.encode_msg(other, Postgrex.Box)
     end
   end
 
diff --git a/lib/postgrex/extensions/circle.ex b/lib/postgrex/extensions/circle.ex
index ec2ce087..0b395b0a 100644
--- a/lib/postgrex/extensions/circle.ex
+++ b/lib/postgrex/extensions/circle.ex
@@ -10,7 +10,7 @@ defmodule Postgrex.Extensions.Circle do
         <<24::int32(), x::float64(), y::float64(), r::float64()>>
 
       other ->
-        raise DBConnection.EncodeError, Postgrex.Utils.encode_msg(other, Postgrex.Path)
+        raise DBConnection.EncodeError, Postgrex.Utils.encode_msg(other, Postgrex.Circle)
     end
   end
 
diff --git a/lib/postgrex/extensions/line_segment.ex b/lib/postgrex/extensions/line_segment.ex
index f3dea2fb..f711ffe7 100644
--- a/lib/postgrex/extensions/line_segment.ex
+++ b/lib/postgrex/extensions/line_segment.ex
@@ -13,7 +13,7 @@ defmodule Postgrex.Extensions.LineSegment do
         [<<32::int32()>>, encoded_p1 | encoded_p2]
 
       other ->
-        raise DBConnection.EncodeError, Postgrex.Utils.encode_msg(other, Postgrex.Line)
+        raise DBConnection.EncodeError, Postgrex.Utils.encode_msg(other, Postgrex.LineSegment)
     end
   end
 
diff --git a/lib/postgrex/result.ex b/lib/postgrex/result.ex
index a9fb0df5..1e39ca39 100644
--- a/lib/postgrex/result.ex
+++ b/lib/postgrex/result.ex
@@ -10,7 +10,7 @@ defmodule Postgrex.Result do
     * `num_rows` - The number of fetched or affected rows;
     * `connection_id` - The OS pid of the PostgreSQL backend that executed the query;
     * `messages` - A list of maps of messages, such as hints and notices, sent by the
-      the driver during the execution of the query
+      driver during the execution of the query.
   """
 
   @type t :: %__MODULE__{