disable tkip on wpa-auto-personal but keep wpa/wpa2 compat setup

Is there anyway to configure wl so that I can still have wpa2 with wpa fallback but disable tkip mode? As of right now I have the following configuration

Auth method - WPA-Auto-Personal
WPA Encryption - TKIP+AES

Now when I checked out wl I found the following 2 interesting commands.

wsec -- set to 6
wpa_auth -- set to 0x84 hex (132 decimal)

Now wsec would be both TKIP (2) and AES (4) and wpa_auth would be both WPA-PSK (4) and WPA2-PSK (128). In this configuration WPA-TKIP, WPA-AES, and WPA2-AES all work. I would like to just drop WPA-TKIP and leave WPA-AES and WPA2-AES working. I tried setting wsec to 4 but that ends up dropping WPA-TKIP and WPA-AES completely. Any help?