diff --git a/src/tools/pw-cat.c b/src/tools/pw-cat.c
index 6b1916d55..a7a8a94d8 100644
--- a/src/tools/pw-cat.c
+++ b/src/tools/pw-cat.c
@@ -1821,6 +1821,7 @@ static void format_from_filename(SF_INFO *info, const char *filename, const char
 	case SF_FORMAT_FLAC:
 	case SF_FORMAT_MPEG:
 	case SF_FORMAT_AIFF:
+	case SF_FORMAT_WAVEX:
 		info->format |= SF_ENDIAN_FILE;
 		break;
 	default: