diff --git a/gui.c b/gui.c
index c1118d7..76f720b 100644
--- a/gui.c
+++ b/gui.c
@@ -704,6 +704,7 @@ typedef struct {
 
 static SupportedFileTypes file_types[] = {
     {"RP250Preset", "*.rp250p"},
+    {"RP355Preset", "*.rp355p"},
     {"RP500Preset", "*.rp500p"},
 };