diff --git a/arch/powerpc/configs/corenet32_smp_defconfig b/arch/powerpc/configs/corenet32_smp_defconfig
index 129a8d141963e0788c4a3f45b2dae906494bdaa6..37659937bd12d99fabe01bc0f680d34d8c7b454f 100644
--- a/arch/powerpc/configs/corenet32_smp_defconfig
+++ b/arch/powerpc/configs/corenet32_smp_defconfig
@@ -116,6 +116,8 @@ CONFIG_NVRAM=y
 CONFIG_I2C=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_MPC=y
+CONFIG_I2C_MUX=y
+CONFIG_I2C_MUX_PCA954x=y
 CONFIG_SPI=y
 CONFIG_SPI_GPIO=y
 CONFIG_SPI_FSL_SPI=y
diff --git a/arch/powerpc/configs/corenet64_smp_defconfig b/arch/powerpc/configs/corenet64_smp_defconfig
index 547a267b1247265cd4a0ab3ed11ddbea6a66a0c3..33cd1df818add38e9a0aa7665e4ac966286532b9 100644
--- a/arch/powerpc/configs/corenet64_smp_defconfig
+++ b/arch/powerpc/configs/corenet64_smp_defconfig
@@ -109,6 +109,8 @@ CONFIG_SERIAL_8250_RSA=y
 CONFIG_I2C=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_MPC=y
+CONFIG_I2C_MUX=y
+CONFIG_I2C_MUX_PCA954x=y
 CONFIG_SPI=y
 CONFIG_SPI_GPIO=y
 CONFIG_SPI_FSL_SPI=y