diff --git a/libretro/libretro.c b/libretro/libretro.c
index 84561c2..c7e2e5b 100644
--- a/libretro/libretro.c
+++ b/libretro/libretro.c
@@ -712,7 +712,7 @@ void retro_get_system_info(struct retro_system_info *info)
 {
    info->library_name = "Genesis Plus GX";
    info->library_version = "v1.7.3";
-   info->valid_extensions = "md|smd|bin|cue|gen|zip|MD|SMD|bin|iso|ISO|CUE|GEN|ZIP|sms|SMS|gg|GG|sg|SG";
+   info->valid_extensions = "md|smd|bin|cue|gen|iso|sms|gg|sg";
    info->block_extract = false;
    info->need_fullpath = true;
 }