diff --git a/src/soc/intel/baytrail/lpe.c b/src/soc/intel/baytrail/lpe.c
index 9636640..3fa5459 100644
--- a/src/soc/intel/baytrail/lpe.c
+++ b/src/soc/intel/baytrail/lpe.c
@@ -42,7 +42,7 @@
 #define FIRMWARE_REG_BASE_C0 0x144000
 #define FIRMWARE_REG_LENGTH_C0 (FIRMWARE_REG_BASE_C0 + 4)
 
-static void assign_device_nvs(struct device *dev, u32 *field, unsigned index)
+static void assign_device_nvs(struct device *dev, u32 *field, unsigned int index)
 {
 	struct resource *res;