diff --git a/src/util/time.h b/src/util/time.h
--- a/src/util/time.h
+++ b/src/util/time.h
@@ -60,9 +60,17 @@
 // Like GetTime(), but not mockable
 int64_t GetTimeSeconds();
 
-/** For testing. Set e.g. with the setmocktime rpc, or -mocktime argument */
+/**
+ * DEPRECATED
+ * Use SetMockTime with chrono type
+ *
+ * @param[in] nMockTimeIn Time in seconds.
+ */
 void SetMockTime(int64_t nMockTimeIn);
 
+/** For testing. Set e.g. with the setmocktime rpc, or -mocktime argument */
+void SetMockTime(std::chrono::seconds mock_time_in);
+
 /** For testing */
 std::chrono::seconds GetMockTime();
 
diff --git a/src/util/time.cpp b/src/util/time.cpp
--- a/src/util/time.cpp
+++ b/src/util/time.cpp
@@ -96,6 +96,9 @@
     nMockTime.store(nMockTimeIn, std::memory_order_relaxed);
 }
 
+void SetMockTime(std::chrono::seconds mock_time_in) {
+    nMockTime.store(mock_time_in.count(), std::memory_order_relaxed);
+}
 std::chrono::seconds GetMockTime() {
     return std::chrono::seconds(nMockTime.load(std::memory_order_relaxed));
 }