diff --git a/rpcs3/Emu/Cell/Modules/cellGame.cpp b/rpcs3/Emu/Cell/Modules/cellGame.cpp
index 5fecd84615..8d651a552b 100644
--- a/rpcs3/Emu/Cell/Modules/cellGame.cpp
+++ b/rpcs3/Emu/Cell/Modules/cellGame.cpp
@@ -175,6 +175,24 @@ struct content_permission final
 	}
 };
 
+template<>
+void fmt_class_string<content_permission::check_mode>::format(std::string& out, u64 arg)
+{
+	format_enum(out, arg, [](auto error)
+	{
+		switch (error)
+		{
+			STR_CASE(content_permission::check_mode::not_set);
+			STR_CASE(content_permission::check_mode::game_data);
+			STR_CASE(content_permission::check_mode::patch);
+			STR_CASE(content_permission::check_mode::hdd_game);
+			STR_CASE(content_permission::check_mode::disc_game);
+		}
+
+		return unknown;
+	});
+}
+
 error_code cellHddGameCheck(ppu_thread& ppu, u32 version, vm::cptr<char> dirName, u32 errDialog, vm::ptr<CellHddGameStatCallback> funcStat, u32 container)
 {
 	cellGame.warning("cellHddGameCheck(version=%d, dirName=%s, errDialog=%d, funcStat=*0x%x, container=%d)", version, dirName, errDialog, funcStat, container);
@@ -1099,10 +1117,10 @@ public:
 		switch (mode)
 		{
 		case content_permission::check_mode::game_data:
+		case content_permission::check_mode::patch: // TODO: it's unclear if patch mode should also support these flags
 		{
 			return !!(flags & (is_setter ? strkey_flag::set_game_data : strkey_flag::get_game_data));
 		}
-		case content_permission::check_mode::patch:
 		case content_permission::check_mode::hdd_game:
 		case content_permission::check_mode::disc_game:
 		{
@@ -1185,7 +1203,7 @@ error_code cellGameGetParamString(s32 id, vm::ptr<char> buf, u32 bufsize)
 	if (!key.is_supported(false, perm.mode))
 	{
 		// TODO: this error is possibly only returned during debug mode
-		return CELL_GAME_ERROR_NOTSUPPORTED;
+		return { CELL_GAME_ERROR_NOTSUPPORTED, "id %d is not supported in the current check mode: %s", id, perm.mode.load() };
 	}
 
 	const auto value = psf::get_string(perm.sfo, key.name);