diff --git a/deamon/seriell/process.c b/deamon/seriell/process.c
index 5b5c93d..9211b2b 100644
--- a/deamon/seriell/process.c
+++ b/deamon/seriell/process.c
@@ -286,10 +286,12 @@ static pyano_data process_pyano(time_t timestamp, u_char address, u_char *buffer
 
 /* einen vorzeichenbehafteten 14-Bit Binärwert in einen Int umwandeln*/
 static int convert_signed_int(u_char hi_byte, u_char lo_byte){
-  int val;  
+  unsigned int val  = 0;
+  unsigned int mask = 0;
   val = convert_unsigned_int(hi_byte,lo_byte);
   if (get_bit(val,13)){
-    val |= ~(0x3FFF);
+    mask += (0x3FFF);
+    val  |= ~mask;
   }
   return val;
 }
diff --git a/debian/changelog b/debian/changelog
index 7033d57..056501b 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+weatherstation (1.0.4-1) stable; urgency=low
+
+  * second try to fix negative tempatatures
+
+ -- Jan Losinski <losinski@wh2.tu-dresden.de>  Thu,  2 Nov 2006 09:38:14 +0100
+
 weatherstation (1.0.3-1) stable; urgency=low
 
   * Some license-changes in the frontend