diff --git a/hash/gjmovie.xml b/hash/gjmovie.xml
index 4123bd85c68..09270afe44a 100644
--- a/hash/gjmovie.xml
+++ b/hash/gjmovie.xml
@@ -2,10 +2,13 @@
 <!DOCTYPE softwarelist SYSTEM "softwarelist.dtd">
 <softwarelist name="gjmovie" description="VTech Genius Junior Movie cartridges">
 
+<!-- According to the boxart, this is compatible with: Junior Movie/Leader Movie
+     A (later) sticker says compatibility extends to Leader Action -->
 	<software name="wuz" supported="no">
 		<description>Wort-und Zahlenspaß</description>
 		<year>1993</year>
 		<publisher>VTech</publisher>
+		<info name="serial" value="80-1883" />
 		<part name="rom" interface="genius_cart">
 			<dataarea name="rom" size="0x40000">
 				<rom name="27-5364-00.u6" size="0x40000" crc="203f0461" sha1="dfc8bb341f703c5f018a7222c24d4a2195316387"/>
diff --git a/src/lib/formats/flex_dsk.cpp b/src/lib/formats/flex_dsk.cpp
index cb2dbb33b12..0d4aa038e60 100644
--- a/src/lib/formats/flex_dsk.cpp
+++ b/src/lib/formats/flex_dsk.cpp
@@ -91,8 +91,8 @@ int flex_format::find_size(io_generic *io, uint32_t form_factor)
 	}
 	if (info.disk_ext[0] || info.disk_ext[1] || info.disk_ext[2]) {
 	  LOG_FORMATS(".");
-	  for (int i = 0; i < sizeof(info.disk_name); i++) {
-		uint8_t ch = info.disk_name[i];
+	  for (int i = 0; i < sizeof(info.disk_ext); i++) {
+		uint8_t ch = info.disk_ext[i];
 		if (ch < 0x20 || ch > 0x7f) {
 		  LOG_FORMATS("[%02x]", ch);
 		} else {