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-rw-r--r--src/frontend/mame/ui/utils.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/frontend/mame/ui/utils.cpp b/src/frontend/mame/ui/utils.cpp
index 95e76944d61..ab1f3ae481e 100644
--- a/src/frontend/mame/ui/utils.cpp
+++ b/src/frontend/mame/ui/utils.cpp
@@ -906,7 +906,7 @@ public:
if (m_include_clones)
{
int const found(driver_list::find(system.driver->parent));
- return m_cache.end() != m_cache.find(&driver_list::driver(found));
+ return found >= 0 && m_cache.end() != m_cache.find(&driver_list::driver(found));
}
return false;