diff --git a/libowlps/owlps.h b/libowlps/owlps.h
index 9a9f9d6..a9f5e34 100644
--- a/libowlps/owlps.h
+++ b/libowlps/owlps.h
@@ -108,7 +108,7 @@ typedef struct _owl_captured_request
   uint8_t mobile_ip_addr_bytes[4] ; // IP of the mobile
   owl_timestamp request_time ; // Timestamp on the mobile
   owl_timestamp capture_time ; // Timestamp of arrival on the listener
-  uint8_t ss_dbm ; // Signal strength measured by the listener (dBm)
+  int8_t ss_dbm ; // Signal strength measured by the listener (dBm)
   /* Calibration data */
   float x_position ;
   float y_position ;
@@ -143,7 +143,7 @@ typedef struct _owl_request_info
   uint16_t packet_id ; // Number of the current packet
   uint8_t ap_mac_addr_bytes[ETHER_ADDR_LEN] ; // MAC of the listener
   owl_timestamp capture_time ; // Timestamp of arrival on the listener
-  uint8_t ss_dbm ; // Signal strength measured by the listener (dBm)
+  int8_t ss_dbm ; // Signal strength measured by the listener (dBm)
 } owl_request_info ;
 
 
diff --git a/owlps-aggregator/owlps-aggregator.h b/owlps-aggregator/owlps-aggregator.h
index 692e81a..ccbea51 100644
--- a/owlps-aggregator/owlps-aggregator.h
+++ b/owlps-aggregator/owlps-aggregator.h
@@ -76,7 +76,7 @@ typedef struct _request_info_list
   // Timestamp of arrival on the listener:
   owl_timestamp capture_time ;
   // Signal strength received by the AP from the mobile:
-  uint8_t ss_dbm ;
+  int8_t ss_dbm ;
   struct _request_info_list *next ;
 } request_info_list ;
 
diff --git a/owlps-aggregator/owlps-aggregatord.c b/owlps-aggregator/owlps-aggregatord.c
index 90d584a..66d7ffa 100644
--- a/owlps-aggregator/owlps-aggregatord.c
+++ b/owlps-aggregator/owlps-aggregatord.c
@@ -579,7 +579,7 @@ int read_loop(int sockfd)
                   "\tMobile IP: %s\n"
                   "\tRequest timestamp: %s\n"
                   "\tRequest arrival time on the AP: %s\n"
-                  "\tSignal: %d dBm\n"
+                  "\tSignal: %"PRId8" dBm\n"
                   "\tPosition X: %f\n"
                   "\tPosition Y: %f\n"
                   "\tPosition Z: %f\n"
@@ -592,7 +592,7 @@ int read_loop(int sockfd)
                   mobile_ip_str,
                   request_time_str,
                   capture_time_str,
-                  request.ss_dbm - 256,
+                  request.ss_dbm,
                   request.x_position,
                   request.y_position,
                   request.z_position,
@@ -761,10 +761,10 @@ void* monitor_requests(void *NULL_value)
                       owl_mac_bytes_to_string_r(request_info_ptr->
                                                 ap_mac_addr_bytes,
                                                 mac_str) ;
-                      fprintf(fd, ";%s;%"PRIu16";%d",
+                      fprintf(fd, ";%s;%"PRIu16";%"PRId8,
                               mac_str,
                               request_info_ptr->packet_id,
-                              request_info_ptr->ss_dbm - 256) ;
+                              request_info_ptr->ss_dbm) ;
 
                       // Delete request
                       request_info_ptr = request_info_ptr->next ;
@@ -1421,9 +1421,9 @@ void print_request_info(request_info_list *info)
   owl_mac_bytes_to_string_r(info->ap_mac_addr_bytes, ap_mac_str) ;
   fprintf(stderr,
           "\tAP MAC: %s\n"
-          "\tSignal strength: %d dBm\n",
+          "\tSignal strength: %"PRId8" dBm\n",
           ap_mac_str,
-          info->ss_dbm - 256
+          info->ss_dbm
           ) ;
 }
 #endif // NDEBUG
diff --git a/owlps-listener/owlps-listenerd.c b/owlps-listener/owlps-listenerd.c
index 43f31ae..35148f8 100644
--- a/owlps-listener/owlps-listenerd.c
+++ b/owlps-listener/owlps-listenerd.c
@@ -1201,7 +1201,7 @@ void read_packet(const struct pcap_pkthdr *pkt_header,
              "\tMobile IP: %s\n"
              "\tRequest timestamp: %s\n"
              "\tRequest arrival time on the AP: %s\n"
-             "\tSignal: %d dBm\n"
+             "\tSignal: %"PRId8" dBm\n"
              "\tPosition X: %f\n"
              "\tPosition Y: %f\n"
              "\tPosition Z: %f\n"
@@ -1215,7 +1215,7 @@ void read_packet(const struct pcap_pkthdr *pkt_header,
              mobile_ip_str,
              request_time_str,
              capture_time_str,
-             rtap_fields[RTAP_ANTENNASIGNALDBM] ? request.ss_dbm - 256 : 0,
+             rtap_fields[RTAP_ANTENNASIGNALDBM] ? request.ss_dbm : 0,
              owl_ntohf(request.x_position),
              owl_ntohf(request.y_position),
              owl_ntohf(request.z_position),
@@ -1340,8 +1340,7 @@ void extract_radiotap_data(const u_char *pkt_data,
               memcpy(&request->ss_dbm,
                      &pkt_data[rtap_position], RTAP_L_ANTENNASIGNALDBM) ;
               if (VERBOSE_INFO)
-                printf("Antenna signal: %d dBm\n",
-                       request->ss_dbm - 256);
+                printf("Antenna signal: %"PRId8" dBm\n", request->ss_dbm) ;
               rtap_position += RTAP_L_ANTENNASIGNALDBM ;
               break ;
             case RTAP_ANTENNANOISEDBM:
diff --git a/owlps-positioner/src/inputudpsocket.cc b/owlps-positioner/src/inputudpsocket.cc
index 2cbbd87..0439f34 100644
--- a/owlps-positioner/src/inputudpsocket.cc
+++ b/owlps-positioner/src/inputudpsocket.cc
@@ -227,10 +227,7 @@ bool InputUDPSocket::fill_current_request()
       owl_ntoh_timestamp(&request_info.capture_time) ;
       Timestamp capture_time(request_info.capture_time) ;
 
-      // Substracting 256 is not mandatory here since it is done
-      // automatically when casting from unsigned to signed, but
-      // I write it anyway for the sake of clarity.
-      ss_t ss = request_info.ss_dbm - 256 ;
+      ss_t ss = request_info.ss_dbm ;
 
       if (Configuration::is_configured("verbose"))
         cerr