diff --git a/src/main/java/w2phtml/xhtml/style/FrameStyleParser.java b/src/main/java/w2phtml/xhtml/style/FrameStyleParser.java
index 34a7a19..9746f25 100644
--- a/src/main/java/w2phtml/xhtml/style/FrameStyleParser.java
+++ b/src/main/java/w2phtml/xhtml/style/FrameStyleParser.java
@@ -150,6 +150,15 @@ public class FrameStyleParser extends StyleWithPropertiesParser {
 				if (s != null) {
 					if (s.equals("bt-lr")) {
 						props.addProperty("writing-mode", "sideways-lr");
+					} 
+				}
+			} else if (bInherit || style.hasProperty(XMLString.STYLE_WRITING_MODE)){
+				s = style.getAbsoluteProperty(XMLString.STYLE_WRITING_MODE);
+				if (s != null) {
+					if (s.equals("tb-rl")) {
+						props.addProperty("writing-mode", "vertical-rl");
+					} else if (s.equals("lr-tb")) {
+						props.addProperty("writing-mode", "horizontal-tb");
 					}
 				}
 			}