diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index 9fd46cfc1e1..9cdfe2bcd24 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -728,7 +728,7 @@ QString ConnectionTypeToQString(ConnectionType conn_type, bool prepend_direction
     assert(false);
 }
 
-QString formatDurationStr(std::chrono::seconds dur)
+QString formatDurationStr(std::chrono::nanoseconds dur)
 {
     const auto d{std::chrono::duration_cast<std::chrono::days>(dur)};
     const auto h{std::chrono::duration_cast<std::chrono::hours>(dur - d)};
diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h
index bcde397d7ba..f34c4eac181 100644
--- a/src/qt/guiutil.h
+++ b/src/qt/guiutil.h
@@ -228,8 +228,8 @@ namespace GUIUtil
     /** Convert enum ConnectionType to QString */
     QString ConnectionTypeToQString(ConnectionType conn_type, bool prepend_direction);
 
-    /** Convert seconds into a QString with days, hours, mins, secs */
-    QString formatDurationStr(std::chrono::seconds dur);
+    /// Convert a duration into a QString with days, hours, mins, secs. This ignores sub-seconds.
+    QString formatDurationStr(std::chrono::nanoseconds dur);
 
     /** Convert peer connection time to a QString denominated in the most relevant unit. */
     QString FormatPeerAge(std::chrono::seconds time_connected);