diff --git a/src/sqlite3_lib.erl b/src/sqlite3_lib.erl
index 2ab6aa3..75b1698 100644
--- a/src/sqlite3_lib.erl
+++ b/src/sqlite3_lib.erl
@@ -382,7 +382,7 @@ pk_constraint_sql(Constraint) ->
         desc -> "DESC";
         asc -> "ASC";
         autoincrement -> "AUTOINCREMENT";
-        L -> lists:map(fun pk_constraint_sql/1, L)
+        List -> map_intersperse(fun pk_constraint_sql/1, List, " ")
     end.
 
 -spec constraint_sql(any()) -> iolist().
diff --git a/test/sqlite3_test.erl b/test/sqlite3_test.erl
index dcde337..29a4ab2 100644
--- a/test/sqlite3_test.erl
+++ b/test/sqlite3_test.erl
@@ -62,7 +62,7 @@ basic_functionality() ->
     Columns = ["id", "name", "age", "wage"],
     AllRows = [{1, <<"abby">>, 20, 2000}, {2, <<"marge">>, 30, 2000}],
     AbbyOnly = [{1, <<"abby">>, 20, 2000}],
-    TableInfo = [{id, integer, [{primary_key, [autoincrement]}]}, {name, text, [not_null, unique]}, {age, integer}, {wage, integer}],
+    TableInfo = [{id, integer, [{primary_key, [asc, autoincrement]}]}, {name, text, [not_null, unique]}, {age, integer}, {wage, integer}],
     drop_all_tables(ct),
     ?WARN_ERROR_MESSAGE,
     ?assertEqual(