diff --git a/target/linux/brcm47xx/config-3.6 b/target/linux/brcm47xx/config-3.6
index 7f1ea7d724..e527ffc3f7 100644
--- a/target/linux/brcm47xx/config-3.6
+++ b/target/linux/brcm47xx/config-3.6
@@ -110,10 +110,7 @@ CONFIG_PERF_USE_VMALLOC=y
 CONFIG_PHYLIB=y
 # CONFIG_PREEMPT_RCU is not set
 # CONFIG_SCSI_DMA is not set
-# CONFIG_SERIAL_8250_DETECT_IRQ is not set
 CONFIG_SERIAL_8250_EXTENDED=y
-# CONFIG_SERIAL_8250_MANY_PORTS is not set
-# CONFIG_SERIAL_8250_RSA is not set
 CONFIG_SERIAL_8250_SHARE_IRQ=y
 CONFIG_SSB=y
 CONFIG_SSB_B43_PCI_BRIDGE=y
diff --git a/target/linux/brcm47xx/config-3.8 b/target/linux/brcm47xx/config-3.8
index 177c271cfb..fd71b8d213 100644
--- a/target/linux/brcm47xx/config-3.8
+++ b/target/linux/brcm47xx/config-3.8
@@ -119,10 +119,7 @@ CONFIG_PERF_USE_VMALLOC=y
 CONFIG_PHYLIB=y
 # CONFIG_PREEMPT_RCU is not set
 # CONFIG_SCSI_DMA is not set
-# CONFIG_SERIAL_8250_DETECT_IRQ is not set
 CONFIG_SERIAL_8250_EXTENDED=y
-# CONFIG_SERIAL_8250_MANY_PORTS is not set
-# CONFIG_SERIAL_8250_RSA is not set
 CONFIG_SERIAL_8250_SHARE_IRQ=y
 CONFIG_SSB=y
 CONFIG_SSB_B43_PCI_BRIDGE=y