diff --git a/channel.c b/channel.c
index 302592dfc..407ce632f 100644
--- a/channel.c
+++ b/channel.c
@@ -56,6 +56,9 @@ static const char * const iio_chan_type_name_spec[] = {
 	[IIO_COUNT] = "count",
 	[IIO_INDEX] = "index",
 	[IIO_GRAVITY] = "gravity",
+	[IIO_POSITIONRELATIVE] = "positionrelative",
+	[IIO_PHASE] = "phase",
+	[IIO_MASSCONCENTRATION] = "massconcentration",
 };
 
 static const char * const modifier_names[] = {
@@ -79,6 +82,7 @@ static const char * const modifier_names[] = {
 	[IIO_MOD_LIGHT_GREEN] = "green",
 	[IIO_MOD_LIGHT_BLUE] = "blue",
 	[IIO_MOD_LIGHT_UV] = "uv",
+	[IIO_MOD_LIGHT_DUV] = "duv",
 	[IIO_MOD_QUATERNION] = "quaternion",
 	[IIO_MOD_TEMP_AMBIENT] = "ambient",
 	[IIO_MOD_TEMP_OBJECT] = "object",
@@ -94,7 +98,13 @@ static const char * const modifier_names[] = {
 	[IIO_MOD_I] = "i",
 	[IIO_MOD_Q] = "q",
 	[IIO_MOD_CO2] = "co2",
+	[IIO_MOD_ETHANOL] = "ethanol",
+	[IIO_MOD_H2] = "h2",
 	[IIO_MOD_VOC] = "voc",
+	[IIO_MOD_PM1] = "pm1",
+	[IIO_MOD_PM2P5] = "pm2p5",
+	[IIO_MOD_PM4] = "pm4",
+	[IIO_MOD_PM10] = "pm10",
 };
 
 /*
diff --git a/iio.h b/iio.h
index 5c11fcefe..5afc28ea0 100644
--- a/iio.h
+++ b/iio.h
@@ -125,6 +125,9 @@ enum iio_chan_type {
 	IIO_COUNT,
 	IIO_INDEX,
 	IIO_GRAVITY,
+	IIO_POSITIONRELATIVE,
+	IIO_PHASE,
+	IIO_MASSCONCENTRATION,
 	IIO_CHAN_TYPE_UNKNOWN = INT_MAX
 };
 
@@ -173,6 +176,13 @@ enum iio_modifier {
 	IIO_MOD_CO2,
 	IIO_MOD_VOC,
 	IIO_MOD_LIGHT_UV,
+	IIO_MOD_LIGHT_DUV,
+	IIO_MOD_PM1,
+	IIO_MOD_PM2P5,
+	IIO_MOD_PM4,
+	IIO_MOD_PM10,
+	IIO_MOD_ETHANOL,
+	IIO_MOD_H2,
 };
 
 /* ---------------------------------------------------------------------------*/