diff --git a/usr.bin/m4/m4.1 b/usr.bin/m4/m4.1
index 8250960cde5..95d2e4afe01 100644
--- a/usr.bin/m4/m4.1
+++ b/usr.bin/m4/m4.1
@@ -376,7 +376,7 @@ to work.
 .Pp
 For portability, one should not use the macros
 .Ic builtin ,
-.Ic esycmd ,
+.Ic esyscmd ,
 .Ic expr ,
 .Ic indir ,
 .Ic paste ,