diff --git a/cheevos/cheevos.c b/cheevos/cheevos.c
index a2ecab375a..c23f0ea7b3 100644
--- a/cheevos/cheevos.c
+++ b/cheevos/cheevos.c
@@ -501,7 +501,9 @@ static unsigned rcheevos_peek(unsigned address, unsigned num_bytes, void* ud)
       }
    }
 
-   rcheevos_invalidate_address(address);
+   if (address < rcheevos_locals.memory.total_size)
+      rcheevos_invalidate_address(address);
+
    return 0;
 }