diff --git a/libs/temporal/temporal/superclock.h b/libs/temporal/temporal/superclock.h
index bb3032a4f2..a489bf1126 100644
--- a/libs/temporal/temporal/superclock.h
+++ b/libs/temporal/temporal/superclock.h
@@ -25,7 +25,7 @@
 
 namespace Temporal {
 
-typedef uint64_t superclock_t;
+typedef int64_t superclock_t;
 
 extern superclock_t superclock_ticks_per_second;