diff --git a/src/drivers/ms5611/ms5611.h b/src/drivers/ms5611/ms5611.h
index cc3e4c5920..4f8b18a6cf 100644
--- a/src/drivers/ms5611/ms5611.h
+++ b/src/drivers/ms5611/ms5611.h
@@ -38,8 +38,26 @@
  */
 
 #define ADDR_RESET_CMD				0x1E	/* write to this address to reset chip */
-#define ADDR_CMD_CONVERT_D1		0x48	/* write to this address to start pressure conversion */
-#define ADDR_CMD_CONVERT_D2		0x58	/* write to this address to start temperature conversion */
+#define ADDR_CMD_CONVERT_D1_OSR256		0x40	/* write to this address to start pressure conversion */
+#define ADDR_CMD_CONVERT_D1_OSR512		0x42	/* write to this address to start pressure conversion */
+#define ADDR_CMD_CONVERT_D1_OSR1024		0x44	/* write to this address to start pressure conversion */
+#define ADDR_CMD_CONVERT_D1_OSR2048		0x46	/* write to this address to start pressure conversion */
+#define ADDR_CMD_CONVERT_D1_OSR4096		0x48	/* write to this address to start pressure conversion */
+#define ADDR_CMD_CONVERT_D2_OSR256		0x50	/* write to this address to start temperature conversion */
+#define ADDR_CMD_CONVERT_D2_OSR512		0x52	/* write to this address to start temperature conversion */
+#define ADDR_CMD_CONVERT_D2_OSR1024		0x54	/* write to this address to start temperature conversion */
+#define ADDR_CMD_CONVERT_D2_OSR2048		0x56	/* write to this address to start temperature conversion */
+#define ADDR_CMD_CONVERT_D2_OSR4096		0x58	/* write to this address to start temperature conversion */
+
+/*
+  use an OSR of 1024 to reduce the self-heating effect of the
+  sensor. Information from MS tells us that some individual sensors
+  are quite sensitive to this effect and that reducing the OSR can
+  make a big difference
+ */
+#define ADDR_CMD_CONVERT_D1			ADDR_CMD_CONVERT_D1_OSR1024
+#define ADDR_CMD_CONVERT_D2			ADDR_CMD_CONVERT_D2_OSR1024
+
 #define ADDR_DATA							0x00	/* address of 3 bytes / 32bit pressure data */
 #define ADDR_PROM_SETUP				0xA0	/* address of 8x 2 bytes factory and calibration data */
 #define ADDR_PROM_C1					0xA2	/* address of 6x 2 bytes calibration data */