diff --git a/bootstrap.conf b/bootstrap.conf
index 74c87b27..f55ad6a6 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -52,7 +52,6 @@ fdl
 findprog-in
 getloadavg
 host-cpu-c-abi
-mempcpy
 strerror
 strtoll
 make-glob"
diff --git a/configure.ac b/configure.ac
index d43cfd78..da6d6a5f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -133,7 +133,7 @@ AS_IF([test "$ac_cv_func_gettimeofday" = yes],
             [Define to 1 if you have a standard gettimeofday function])
 ])
 
-AC_CHECK_FUNCS([strdup strndup memrchr umask mkstemp mktemp fdopen \
+AC_CHECK_FUNCS([strdup strndup memrchr mempcpy umask mkstemp mktemp fdopen \
                 dup dup2 getcwd realpath sigsetmask sigaction \
                 getgroups seteuid setegid setlinebuf setreuid setregid \
                 getrlimit setrlimit setvbuf pipe strsignal \