diff --git a/src/commands.cc b/src/commands.cc
index 660a2726..001ba0f9 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -1875,11 +1875,6 @@ const CommandDesc map_key_cmd = {
         if (key.size() != 1)
             throw runtime_error("only a single key can be mapped");
 
-        KeymapMode lower_case_only_modes[] = {KeymapMode::Goto};
-        if (key[0].codepoint().map(iswupper).value_or(false) and
-            contains(lower_case_only_modes, keymap_mode))
-            throw runtime_error("mode only supports lower case mappings");
-
         KeyList mapping = parse_keys(parser[3]);
         keymaps.map_key(key[0], keymap_mode, std::move(mapping),
                         trim_indent(parser.get_switch("docstring").value_or("")));