diff --git a/CHANGES b/CHANGES
index aa56ae3a..e46bd0e6 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4,6 +4,7 @@ lm_sensors CHANGES file
 SVN HEAD
   RPM: Obsolete, removed
   File doc/fan-divisors: Update
+  File sensors_vid.h: Trim VID values to correct number of bits (2.6 backport)
   Library: Add support for the pc87247 driver (fans only)
            Probe for busses before chips
            Drop support for algorithm names
diff --git a/kernel/include/sensors_vid.h b/kernel/include/sensors_vid.h
index a695fc40..81b36b66 100644
--- a/kernel/include/sensors_vid.h
+++ b/kernel/include/sensors_vid.h
@@ -58,6 +58,7 @@ static inline int vid_from_reg(int val, int vrm)
 	switch(vrm) {
 
 	case 100:		/* VRD 10.0 */
+		val &= 0x3f;
 		if((val & 0x1f) == 0x1f)
 			return 0;
 		if((val & 0x1f) <= 0x09 || val == 0x0a)
@@ -70,14 +71,17 @@ static inline int vid_from_reg(int val, int vrm)
 		return vid;
 
 	case 24:		/* Opteron processor */
+		val &= 0x1f;
 		return(val == 0x1f ? 0 : 1550 - val * 25);
 
 	case 91:		/* VRM 9.1 */
 	case 90:		/* VRM 9.0 */
+		val &= 0x1f;
 		return(val == 0x1f ? 0 :
 		                       1850 - val * 25);
 
 	case 85:		/* VRM 8.5 */
+		val &= 0x1f;
 		return((val & 0x10  ? 25 : 0) +
 		       ((val & 0x0f) > 0x04 ? 2050 : 1250) -
 		       ((val & 0x0f) * 50));
@@ -86,6 +90,7 @@ static inline int vid_from_reg(int val, int vrm)
 		val &= 0x0f;
 				/* fall through */
 	default:		/* VRM 8.2 */
+		val &= 0x1f;
 		return(val == 0x1f ? 0 :
 		       val & 0x10  ? 5100 - (val) * 100 :
 		                     2050 - (val) * 50);