diff --git a/mode_s.c b/mode_s.c
index 6510c25..b81913d 100644
--- a/mode_s.c
+++ b/mode_s.c
@@ -1107,8 +1107,12 @@ void displayModesMessage(struct modesMessage *mm) {
     if (mm->score)
         printf("Score: %d\n", mm->score);
 
-    if (mm->timestampMsg)
-        printf("Time: %.2fus (phase: %d)\n", mm->timestampMsg / 12.0, (unsigned int) (360 * (mm->timestampMsg % 6) / 6));
+    if (mm->timestampMsg) {
+        if (mm->timestampMsg == MAGIC_MLAT_TIMESTAMP)
+            printf("This is a synthetic MLAT message.\n");
+        else
+            printf("Time: %.2fus (phase: %d)\n", mm->timestampMsg / 12.0, (unsigned int) (360 * (mm->timestampMsg % 6) / 6));
+    }
 
     if (mm->msgtype == 0) { // DF 0
         printf("DF 0: Short Air-Air Surveillance.\n");