diff --git a/dlls/mshtml/dispex.c b/dlls/mshtml/dispex.c
index f434545e8f5..e42b068c2fd 100644
--- a/dlls/mshtml/dispex.c
+++ b/dlls/mshtml/dispex.c
@@ -206,6 +206,7 @@ HRESULT get_class_typeinfo(const CLSID *clsid, ITypeInfo **typeinfo)
 /* Not all argument types are supported yet */
 #define BUILTIN_ARG_TYPES_SWITCH                        \
     CASE_VT(VT_I2, INT16, V_I2);                        \
+    CASE_VT(VT_UI2, UINT16, V_UI2);                     \
     CASE_VT(VT_I4, INT32, V_I4);                        \
     CASE_VT(VT_R4, float, V_R4);                        \
     CASE_VT(VT_BSTR, BSTR, V_BSTR);                     \