diff --git a/dht11.c b/dht11.c
index 7a8bdd1..0e5798e 100644
--- a/dht11.c
+++ b/dht11.c
@@ -1,5 +1,5 @@
 /* dht11.c -- DHT11 humidity and temperature sensor reading */
-/* Copyright (c) 2020-2021 Renaud Fivet                     */
+/* Copyright (c) 2020-2025 Renaud Fivet                     */
 
 #include "dht11.h"      /* implements DHT11 API */
 
@@ -25,7 +25,7 @@
 unsigned char dht11_humid ; /* 5 .. 95 %RH */
   signed char dht11_tempc ; /* -20 .. 60 C */
 unsigned char dht11_tempf ; /* .0 .. .9 C */
-
+int           dht11_deciC ; /* -200 .. 600 */
 
 void dht11_init( void) {
 /* At startup A13 is ALT DIO with Pull Up enabled */
@@ -79,14 +79,12 @@ dht11_retv_t dht11_read( void) {
     dht11_tempc = values[ 2] ;
     dht11_tempf = values[ 3] ;
     if( dht11_tempf & 0x80) {
-        dht11_tempc *= -1 ;
-        dht11_tempf = 10 - ( dht11_tempf & 0x7F) ;
-        if( dht11_tempf == 10) {
-            dht11_tempc -= 1 ;
-            dht11_tempf = 0 ;
-        }
+        dht11_tempc = -( dht11_tempc + 1) ;
+        dht11_tempf ^= 0x80 ;
     }
     
+    dht11_deciC = dht11_tempc * 10 + dht11_tempf ;
+
     return DHT11_SUCCESS ;
 }
 
diff --git a/dht11.h b/dht11.h
index fb88dc1..d40c864 100644
--- a/dht11.h
+++ b/dht11.h
@@ -1,5 +1,5 @@
-/* dht11.h -- DHT11 API             */
-/* Copyright (c) 2020 Renaud Fivet  */
+/* dht11.h -- DHT11 API                  */
+/* Copyright (c) 2020-2025 Renaud Fivet  */
 
 typedef enum {
     DHT11_SUCCESS,
@@ -12,6 +12,7 @@ typedef enum {
 extern unsigned char dht11_humid ;  /* 5 .. 95 %RH */
 extern   signed char dht11_tempc ;  /* -20 .. 60 C */
 extern unsigned char dht11_tempf ;  /* .0 .. .9 C */
+extern          int  dht11_deciC ;  /* -200 .. 600 */
 
 
 void dht11_init( void) ;
diff --git a/dht11main.c b/dht11main.c
index b769dd0..3912217 100644
--- a/dht11main.c
+++ b/dht11main.c
@@ -1,5 +1,5 @@
 /* dht11main.c -- sample DHT11 sensor   */
-/* Copyright (c) 2020-2023 Renaud Fivet */
+/* Copyright (c) 2020-2025 Renaud Fivet */
 #include <stdio.h>
 
 #include "system.h"
@@ -17,8 +17,8 @@ int main( void) {
             if( 2 == (last % 5))    /* every 5 seconds starting 2s after boot */
                 switch( dht11_read()) {
                 case DHT11_SUCCESS:
-                    printf( "%u%%RH, %d.%uC\n", dht11_humid, dht11_tempc,
-                                                                dht11_tempf) ;
+                    printf( "%u%%RH, %d.%uC, %d\n", dht11_humid, dht11_tempc,
+                                                     dht11_tempf, dht11_deciC) ;
                     break ;
                 case DHT11_FAIL_TOUT:
                     puts( "Timeout") ;
diff --git a/docs/32_errata.html b/docs/32_errata.html
index 51056da..e39ec18 100644
--- a/docs/32_errata.html
+++ b/docs/32_errata.html
@@ -196,13 +196,11 @@ And retest after the following modification.
     dht11_tempc = values[ 2] ;
     dht11_tempf = values[ 3] ;
     if( dht11_tempf & 0x80) {
-        dht11_tempc *= -1 ;
-        dht11_tempf = 10 - ( dht11_tempf & 0x7F) ;
-        if( dht11_tempf == 10) {
-            dht11_tempc -= 1 ;
-            dht11_tempf = 0 ;
-        }
+        dht11_tempc = -( dht11_tempc + 1) ;
+        dht11_tempf ^= 0x80 ;
     }
+    
+    dht11_deciC = dht11_tempc * 10 + dht11_tempf ;
 </pre>
 
 <h2>Stability</h2>
@@ -239,6 +237,6 @@ or how bad the measurements are.
 <a href="33_ds18b20.html">Next</a>, I will use another digital thermometer as a
 reference.
 
-    <hr>© 2020-2024 Renaud Fivet
+    <hr>© 2020-2025 Renaud Fivet
  </body>
 </html>