x3f support
diff --git a/src/cmd/file.c b/src/cmd/file.c
index f325871..0afb9ba 100644
--- a/src/cmd/file.c
+++ b/src/cmd/file.c
@@ -655,6 +655,7 @@
 	"\377\330\377\340",	"jpeg",				4,	"image/jpeg",
 	"\377\330\377\341",	"jpeg",				4,	"image/jpeg",
 	"\377\330\377\333",	"jpeg",				4,	"image/jpeg",
+	"\106\117\126\142",	"x3f",				4,	"image/x3f",
 	"BM",			"bmp",				2,	"image/bmp",
 	"\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1",	"microsoft office document",	8,	"application/octet-stream",
 	"<MakerFile ",		"FrameMaker file",		11,	"application/framemaker",