diff --git a/lib/irb.rb b/lib/irb.rb
index 665f67b946..0cad6a0d41 100644
--- a/lib/irb.rb
+++ b/lib/irb.rb
@@ -62,7 +62,7 @@ require_relative "irb/easter-egg"
 #     -W[level=2]       Same as `ruby -W`
 #     --context-mode n  Set n[0-4] to method to create Binding Object,
 #                       when new workspace was created
-#     --echo            Show result(default)
+#     --echo            Show result (default)
 #     --noecho          Don't show result
 #     --inspect         Use `inspect' for output
 #     --noinspect       Don't use inspect for output
diff --git a/lib/irb/lc/help-message b/lib/irb/lc/help-message
index 30f49947da..fe9e3246d9 100644
--- a/lib/irb/lc/help-message
+++ b/lib/irb/lc/help-message
@@ -20,7 +20,7 @@ Usage:  irb.rb [options] [programfile] [arguments]
   -W[level=2]       Same as `ruby -W`
   --context-mode n  Set n[0-4] to method to create Binding Object,
                     when new workspace was created
-  --echo            Show result(default)
+  --echo            Show result (default)
   --noecho          Don't show result
   --inspect         Use `inspect' for output
   --noinspect       Don't use inspect for output
diff --git a/man/irb.1 b/man/irb.1
index a7f2ce4228..113b986b16 100644
--- a/man/irb.1
+++ b/man/irb.1
@@ -106,7 +106,7 @@ Doesn't use singleline editor module.
 .Pp
 .Pp
 .It Fl -echo
-Show result(default).
+Show result (default).
 .Pp
 .It Fl -noecho
 Don't show result.