diff --git a/src/openrct2-ui/windows/GuestList.cpp b/src/openrct2-ui/windows/GuestList.cpp
index 348193a362..1436ce958f 100644
--- a/src/openrct2-ui/windows/GuestList.cpp
+++ b/src/openrct2-ui/windows/GuestList.cpp
@@ -855,7 +855,10 @@ private:
             _groups.begin(), _groups.end(), [](const GuestGroup& a, const GuestGroup& b) { return a.NumGuests > b.NumGuests; });
 
         // Remove up to MaxGroups
-        _groups.resize(MaxGroups);
+        if (_groups.size() > MaxGroups)
+        {
+            _groups.resize(MaxGroups);
+        }
     }
 
     /**