diff --git a/libvips/foreign/svgload.c b/libvips/foreign/svgload.c
index aa055506..62c747de 100644
--- a/libvips/foreign/svgload.c
+++ b/libvips/foreign/svgload.c
@@ -482,7 +482,7 @@ vips_foreign_load_svg_is_a_buffer( const void *buf, size_t len )
 		if( !isascii( str[i] ) )
 			return( FALSE );
 
-	for( i = 0; i < 200 && i < len - 5; i++ ) 
+	for( i = 0; i < 250 && i < len - 5; i++ )
 		if( g_ascii_strncasecmp( str + i, "<svg", 4 ) == 0 )
 			return( TRUE );