diff --git a/dlls/mshtml/htmlstyle.c b/dlls/mshtml/htmlstyle.c
index 7172bdb333f..4d9300aac51 100644
--- a/dlls/mshtml/htmlstyle.c
+++ b/dlls/mshtml/htmlstyle.c
@@ -3072,6 +3072,8 @@ static const tid_t HTMLStyle_iface_tids[] = {
     IHTMLStyle2_tid,
     IHTMLStyle3_tid,
     IHTMLStyle4_tid,
+    IHTMLStyle5_tid,
+    IHTMLStyle6_tid,
     0
 };
 static dispex_static_data_t HTMLStyle_dispex = {
diff --git a/dlls/mshtml/mshtml_private.h b/dlls/mshtml/mshtml_private.h
index dfa627b1b57..35b934984af 100644
--- a/dlls/mshtml/mshtml_private.h
+++ b/dlls/mshtml/mshtml_private.h
@@ -153,6 +153,8 @@ typedef struct event_target_t event_target_t;
     XIID(IHTMLStyle2) \
     XIID(IHTMLStyle3) \
     XIID(IHTMLStyle4) \
+    XIID(IHTMLStyle5) \
+    XIID(IHTMLStyle6) \
     XIID(IHTMLStyleElement) \
     XIID(IHTMLStyleSheetsCollection) \
     XIID(IHTMLTable) \