diff --git a/doc/syntax.texi b/doc/syntax.texi
index a3aabce1e9..233dd140f7 100644
--- a/doc/syntax.texi
+++ b/doc/syntax.texi
@@ -187,17 +187,17 @@ The following abbreviations are recognized:
 @item pal
 25/1
 @item qntsc
-30000/1
+30000/1001
 @item qpal
 25/1
 @item sntsc
-30000/1
+30000/1001
 @item spal
 25/1
 @item film
 24/1
 @item ntsc-film
-24000/1
+24000/1001
 @end table
 
 @anchor{ratio syntax}