diff --git a/src/helpers/time/Time.hpp b/src/helpers/time/Time.hpp
index 494d7b1ce..82f2e87a6 100644
--- a/src/helpers/time/Time.hpp
+++ b/src/helpers/time/Time.hpp
@@ -28,5 +28,6 @@ namespace Time {
 
         // Exposed for tests to verify borrow handling in timespec math. @Rtur2003
         sec_nsec diff(const sec_nsec& newer, const sec_nsec& older);
+        sec_nsec normalize(const sec_nsec& raw);
     }
 };