diff --git a/pappl/printer.h b/pappl/printer.h
index c261f5f..860cae0 100644
--- a/pappl/printer.h
+++ b/pappl/printer.h
@@ -27,7 +27,7 @@ extern "C" {
 #  define PAPPL_MAX_SOURCE	16	// Maximum number of sources/rolls
 #  define PAPPL_MAX_SUPPLY	32	// Maximum number of supplies
 #  define PAPPL_MAX_TYPE	32	// Maximum number of media types
-#  define PAPPL_MAX_VENDOR	32	// Maximum number of vendor extension attributes
+#  define PAPPL_MAX_VENDOR	256	// Maximum number of vendor extension attributes
 
 
 //