diff --git a/dump1090.c b/dump1090.c
index eae1223..d02ddff 100644
--- a/dump1090.c
+++ b/dump1090.c
@@ -371,7 +371,7 @@ void backgroundTasks(void) {
     trackPeriodicUpdate();
 
     if (Modes.net) {
-	modesNetPeriodicWork();
+        modesNetPeriodicWork();
     }
 
 
diff --git a/mode_s.c b/mode_s.c
index 33e0666..2319593 100644
--- a/mode_s.c
+++ b/mode_s.c
@@ -716,7 +716,7 @@ static void decodeESIdentAndCategory(struct modesMessage *mm)
     mm->callsign[6] = ais_charset[getbits(me, 45, 50)];
     mm->callsign[7] = ais_charset[getbits(me, 51, 56)];
     mm->callsign[8] = 0;
-    
+
     // A common failure mode seems to be to intermittently send
     // all zeros. Catch that here.
     mm->callsign_valid = (strcmp(mm->callsign, "@@@@@@@@") != 0);
diff --git a/net_io.c b/net_io.c
index c0700b8..7229194 100644
--- a/net_io.c
+++ b/net_io.c
@@ -1761,7 +1761,7 @@ __attribute__ ((format (printf,3,0))) static char *safe_vsnprintf(char *p, char
     p += vsnprintf(p < end ? p : NULL, p < end ? (size_t)(end - p) : 0, format, ap);
     return p;
 }
-        
+
  __attribute__ ((format (printf,3,4))) static char *safe_snprintf(char *p, char *end, const char *format, ...)
 {
     va_list ap;
@@ -1771,7 +1771,7 @@ __attribute__ ((format (printf,3,0))) static char *safe_vsnprintf(char *p, char
     return p;
 }
 
-    
+
 __attribute__ ((format (printf,4,5))) static char *appendFATSV(char *p, char *end, const char *field, const char *format, ...)
 {
     va_list ap;
@@ -1780,8 +1780,8 @@ __attribute__ ((format (printf,4,5))) static char *appendFATSV(char *p, char *en
     p = safe_snprintf(p, end, "%s\t", field);
     p = safe_vsnprintf(p, end, format, ap);
     p = safe_snprintf(p, end, "\t");
-    
-    va_end(ap);    
+
+    va_end(ap);
     return p;
 }
 
@@ -1957,17 +1957,17 @@ static inline float heading_difference(float h1, float h2)
         // expired data
         return p;
     }
-    
+
     if (source->updated > messageNow()) {
         // data in the future
         return p;
     }
-    
+
     if (source->updated < a->fatsv_last_emitted) {
         // not updated since last time
         return p;
     }
-    
+
     uint64_t age = (messageNow() - source->updated) / 1000;
     if (age > 255) {
         // too old
@@ -2075,7 +2075,7 @@ static void writeFATSV()
 
         // some special cases:
         int altValid = trackDataValid(&a->altitude_baro_valid);
-        int airgroundValid = trackDataValid(&a->airground_valid) && a->airground_valid.source >= SOURCE_MODE_S_CHECKED; // for non-ADS-B transponders, only trust DF11 CA field        
+        int airgroundValid = trackDataValid(&a->airground_valid) && a->airground_valid.source >= SOURCE_MODE_S_CHECKED; // for non-ADS-B transponders, only trust DF11 CA field
         int gsValid = trackDataValid(&a->gs_valid);
         int squawkValid = trackDataValid(&a->squawk_valid);
         int callsignValid = trackDataValid(&a->callsign_valid) && strcmp(a->callsign, "        ") != 0;
diff --git a/track.c b/track.c
index 22eba28..9fa626a 100644
--- a/track.c
+++ b/track.c
@@ -815,7 +815,7 @@ struct aircraft *trackUpdateFromMessage(struct modesMessage *mm)
     }
 
     _messageNow = mm->sysTimestampMsg;
-    
+
     // Lookup our aircraft or create a new one
     a = trackFindAircraft(mm->addr);
     if (!a) {                              // If it's a currently unknown aircraft....
diff --git a/track.h b/track.h
index 012868d..721f7cc 100644
--- a/track.h
+++ b/track.h
@@ -73,7 +73,7 @@
 //  expired: data is not valid.
 typedef struct {
     uint64_t stale_interval;  /* how long after an update until the data is stale */
-    uint64_t expire_interval; /* how long after an update until the data expires */    
+    uint64_t expire_interval; /* how long after an update until the data expires */
 
     datasource_t source;     /* where the data came from */
     uint64_t updated;        /* when it arrived */