diff --git a/uc.c b/uc.c
index 0e870858..b1ed43a9 100644
--- a/uc.c
+++ b/uc.c
@@ -2220,7 +2220,7 @@ void trace_end(uc_tracer *tracer, trace_loc loc, const char *fmt, ...)
 
     va_end(args);
 
-    fprintf(stderr, "%.6fms\n",
-            (double)(end - tracer->starts[loc]) / (double)(1000000));
+    fprintf(stderr, "%.6fus\n",
+            (double)(end - tracer->starts[loc]) / (double)(1000));
 }
 #endif
\ No newline at end of file