diff --git a/brcm/brcmfmac43455-sdio.raspberrypi,3-model-b-plus.txt b/brcm/brcmfmac43455-sdio.raspberrypi,3-model-b-plus.txt
index ba94f54..e8d6b19 100644
--- a/brcm/brcmfmac43455-sdio.raspberrypi,3-model-b-plus.txt
+++ b/brcm/brcmfmac43455-sdio.raspberrypi,3-model-b-plus.txt
@@ -13,6 +13,7 @@ boardtype=0x6e4
 btc_mode=1
 btc_params1=0x7530
 btc_params8=0x4e20
+btc_params50=0x972c
 cbfilttype=1
 cckPwrIdxCorr=3
 cckTssiDelay=150
diff --git a/brcm/brcmfmac43455-sdio.raspberrypi,4-model-b.txt b/brcm/brcmfmac43455-sdio.raspberrypi,4-model-b.txt
index 425d293..d5bd530 100644
--- a/brcm/brcmfmac43455-sdio.raspberrypi,4-model-b.txt
+++ b/brcm/brcmfmac43455-sdio.raspberrypi,4-model-b.txt
@@ -7,12 +7,13 @@ aa5g=1
 AvVmid_c0=1,165,2,100,2,100,2,100,2,100
 boardflags=0x00480201
 boardflags2=0x40800000
-boardflags3=0x44200100
+boardflags3=0x48200100
 boardrev=0x1304
 boardtype=0x6e4
 btc_mode=1
 btc_params1=0x7530
 btc_params8=0x4e20
+btc_params50=0x972c
 cbfilttype=1
 cckPwrIdxCorr=3
 cckTssiDelay=150