fix typo in comment

diff --git a/m4/prereq.m4 b/m4/prereq.m4
index 6b26058b0ad93f762d6260ded0cd50a2a5f091ea..37960793ca6aae934d1bb579e8de60c3103f2a6f 100644 (file)
--- a/m4/prereq.m4
+++ b/m4/prereq.m4
@@ -207,7 +207,7 @@ AC_DEFUN([jm_PREREQ_STRNLEN],
   AC_CHECK_HEADERS(memory.h)
   AC_CHECK_DECLS([memchr])
 
-  # This is necessary because automake-1.6.1 doens't understand
+  # This is necessary because automake-1.6.1 doesn't understand
   # that the above use of AC_FUNC_STRNLEN means we may have to use
   # lib/strnlen.c.
   test $ac_cv_func_strnlen_working = yes \