diff --git a/bin/erb b/bin/erb
index d060caba90..d5e51ee969 100755
--- a/bin/erb
+++ b/bin/erb
@@ -114,9 +114,9 @@ def run(factory=ERB)
   -d               set $DEBUG to true
   -r library       load a library
   -E ex[:in]       set default external/internal encodings
-  -U               set default encoding to UTF-8.
+  -U               set default encoding to UTF-8
   -T trim_mode     specify trim_mode (0..2, -)
-  -P               ignore lines which start with "%"
+  -P               disable ruby code evaluation for lines beginning with %
   var=value        set variable
 EOU
         exit 1
diff --git a/man/erb.1 b/man/erb.1
index e2821acb6d..d8739a7639 100644
--- a/man/erb.1
+++ b/man/erb.1
@@ -1,5 +1,5 @@
 .\"Ruby is copyrighted by Yukihiro Matsumoto <matz@netlab.jp>.
-.Dd October 21, 2017
+.Dd December 16, 2018
 .Dt ERB \&1 "Ruby Programmer's Reference Guide"
 .Os UNIX
 .Sh NAME
@@ -45,9 +45,8 @@ You can omit the one for internal encodings, then the value
 .Pf ( Li "Encoding.default_internal" ) will be nil.
 .Pp
 .It Fl P
-Evaluates lines starting with
-.Li "%"
-as Ruby code and removes the tailing EOLs.
+Disables ruby code evaluation for lines beginning with
+.Li "%" .
 .Pp
 .It Fl S Ar level
 Specifies the safe level in which eRuby script will run.