diff --git a/libvips/foreign/webp2vips.c b/libvips/foreign/webp2vips.c
index 20873dfc..bb2b6c48 100644
--- a/libvips/foreign/webp2vips.c
+++ b/libvips/foreign/webp2vips.c
@@ -511,7 +511,11 @@ read_header( Read *read, VipsImage *out )
 	if( read->width <= 0 ||
 		read->height <= 0 ||
 		read->width > 0x3FFF ||
-		read->height > VIPS_MAX_COORD ) {
+		read->height > VIPS_MAX_COORD ||
+		read->frame_width <= 0 ||
+		read->frame_height <= 0 ||
+		read->frame_width > 0x3FFF ||
+		read->frame_height > 0x3FFF ) { 
 		vips_error( "webp", "%s", _( "bad image dimensions" ) ); 
 		return( -1 ); 
 	}