diff --git a/HISTORY b/HISTORY
index 2c7873a6..b968ae74 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,6 +1,8 @@
 3.3.1   2017-01-
-        repmgrd: revent invalid apply lag value being written to the
+        repmgrd: prevent invalid apply lag value being written to the
           monitoring table (Ian)
+        repmgrd: fix error in XLogRecPtr conversion when calculating
+          monitoring statistics (Ian)
 
 3.3     2016-12-27
         repmgr: always log to STDERR even if log facility defined (Ian)
diff --git a/repmgrd.c b/repmgrd.c
index a9fd5b54..9e9da664 100644
--- a/repmgrd.c
+++ b/repmgrd.c
@@ -2339,7 +2339,7 @@ lsn_to_xlogrecptr(char *lsn, bool *format_ok)
 	if (format_ok != NULL)
 		*format_ok = true;
 
-	return (((XLogRecPtr) xlogid * 16 * 1024 * 1024 * 255) + xrecoff);
+	return (XLogRecPtr) ((uint64) xlogid) << 32 | (uint64) xrecoff;
 }
 
 void