diff --git a/core/dive.h b/core/dive.h
index 6d6ea5a90..7075cb143 100644
--- a/core/dive.h
+++ b/core/dive.h
@@ -163,7 +163,7 @@ struct sample                         // BASE TYPE BYTES  UNITS    RANGE
 	duration_t rbt;                   // int32_t    4  seconds  (0-34 yrs)             remaining bottom time
 	depth_t depth;                    // int32_t    4    mm     (0-2000 km)            dive depth of this sample
 	depth_t stopdepth;                // int32_t    4    mm     (0-2000 km)            depth of next deco stop
-	temperature_t temperature;        // uint32_t   4  mdegrK   (0-4 MdegK)            ambient temperature
+	temperature_t temperature;        // uint32_t   4    mK     (0-4 MK)               ambient temperature
 	pressure_t pressure[MAX_SENSORS]; // int32_t    4    mbar   (0-2 Mbar)             cylinder pressures (main and CCR o2)
 	o2pressure_t setpoint;            // uint16_t   2    mbar   (0-65 bar)             O2 partial pressure (will be setpoint)
 	o2pressure_t o2sensor[3];         // uint16_t   6    mbar   (0-65 bar)             Up to 3 PO2 sensor values (rebreather)
diff --git a/core/units.h b/core/units.h
index 0e2c2b2e3..60475b75c 100644
--- a/core/units.h
+++ b/core/units.h
@@ -106,12 +106,12 @@ typedef struct
 
 typedef struct
 {
-	uint32_t mkelvin; // up to 4 MdegK (temperatures in K are always positive)
+	uint32_t mkelvin; // up to 4 MK (temperatures in K are always positive)
 } temperature_t;
 
 typedef struct
 {
-	uint64_t mkelvin; // up to 18446744073 MdegK (temperatures in K are always positive)
+	uint64_t mkelvin; // up to 18446744073 MK (temperatures in K are always positive)
 } temperature_sum_t;
 
 typedef struct