diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 37cf2817b3d0..767a7794624a 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -715,6 +715,7 @@ static ssize_t __iio_format_value(char *buf, size_t offset, unsigned int type,
 	case IIO_VAL_DECIMAL64_MICRO:
 	case IIO_VAL_DECIMAL64_NANO:
 	case IIO_VAL_DECIMAL64_PICO:
+	case IIO_VAL_DECIMAL64_FEMTO:
 	{
 		int scale = type - IIO_VAL_DECIMAL64_BASE;
 		s64 frac;
@@ -1032,6 +1033,7 @@ static ssize_t iio_write_channel_info(struct device *dev,
 		case IIO_VAL_DECIMAL64_MICRO:
 		case IIO_VAL_DECIMAL64_NANO:
 		case IIO_VAL_DECIMAL64_PICO:
+		case IIO_VAL_DECIMAL64_FEMTO:
 			dec_scale = type - IIO_VAL_DECIMAL64_BASE;
 			fallthrough;
 		case IIO_VAL_INT_64:
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 924ac9dc6893..d8944c9e5e90 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -42,6 +42,7 @@ enum iio_event_info {
 #define IIO_VAL_DECIMAL64_MICRO		(IIO_VAL_DECIMAL64_BASE + 6)
 #define IIO_VAL_DECIMAL64_NANO		(IIO_VAL_DECIMAL64_BASE + 9)
 #define IIO_VAL_DECIMAL64_PICO		(IIO_VAL_DECIMAL64_BASE + 12)
+#define IIO_VAL_DECIMAL64_FEMTO		(IIO_VAL_DECIMAL64_BASE + 15)
 
 static inline s64 iio_val_s64_compose(s32 val0, s32 val1)
 {