diff --git a/arch/arm/configs/mackerel_defconfig b/arch/arm/configs/mackerel_defconfig
index ec8e605b408c..9fb11895b2e2 100644
--- a/arch/arm/configs/mackerel_defconfig
+++ b/arch/arm/configs/mackerel_defconfig
@@ -75,6 +75,7 @@ CONFIG_I2C=y
 CONFIG_I2C_SH_MOBILE=y
 # CONFIG_HWMON is not set
 # CONFIG_MFD_SUPPORT is not set
+CONFIG_REGULATOR=y
 CONFIG_FB=y
 CONFIG_FB_MODE_HELPERS=y
 CONFIG_FB_SH_MOBILE_LCDC=y