--- a/src/java.desktop/share/native/libfontmanager/harfbuzz/hb-ot-tag.cc	Wed May 30 08:10:41 2018 -0700
+++ b/src/java.desktop/share/native/libfontmanager/harfbuzz/hb-ot-tag.cc	Wed May 30 12:20:00 2018 -0700
@@ -920,7 +920,7 @@
     char tag[4];
     int i;
     s += 6;
-    for (i = 0; i < 4 && ISALPHA (s[i]); i++)
+    for (i = 0; i < 4 && ISALNUM (s[i]); i++)
       tag[i] = TOUPPER (s[i]);
     if (i) {
       for (; i < 4; i++)