diff --git a/bedstead.c b/bedstead.c
index 4ee18d0..7012f49 100644
--- a/bedstead.c
+++ b/bedstead.c
@@ -2898,7 +2898,7 @@ main(int argc, char **argv)
 	TTXI(reserved0, 0); TTXI(reserved1, 0);
 	TTXI(reserved2, 0); TTXI(reserved3, 0);
 	TTXI(metricDataFormat, 0);
-	TTXI(numberOfHMetrics, 2);
+	TTXI(numberOfHMetrics, 0); /* Will be calculated by TTX. */
 	printf(" </hhea>\n");
 
 	printf(" <maxp>\n");