diff --git a/doc/time/sec_i.rdoc b/doc/time/sec_i.rdoc
index 99c8eddc65..fd5519082c 100644
--- a/doc/time/sec_i.rdoc
+++ b/doc/time/sec_i.rdoc
@@ -1 +1 @@
-- +isec_i+ is the integer number of seconds in the range <tt>0..60</tt>.
+- +sec_i+ is the integer number of seconds in the range <tt>0..60</tt>.