diff --git a/configure.ac b/configure.ac
index 06ecda5..961cf18 100644
--- a/configure.ac
+++ b/configure.ac
@@ -117,6 +117,11 @@ AC_CHECK_FUNC(strtonum,
 	AC_DEFINE(NO_STRTONUM)
 	AM_CONDITIONAL(NO_STRTONUM, true))
 
+AC_CHECK_FUNC(memmem,
+	AM_CONDITIONAL(NO_MEMMEM, false),
+	AC_DEFINE(NO_MEMMEM)
+	AM_CONDITIONAL(NO_MEMMEM, true))
+
 AC_CHECK_FUNC(explicit_bzero,
 	AM_CONDITIONAL(NO_EXPLICIT_BZERO, false),
 	AC_DEFINE(NO_EXPLICIT_BZERO)
diff --git a/update.sh b/update.sh
index 269b670..a087a4c 100755
--- a/update.sh
+++ b/update.sh
@@ -321,7 +321,9 @@ $CP $libc_src/string/memmem.c tests/
 		echo "${TEST}_LDADD = \$(top_builddir)/ssl/libssl.la" >> Makefile.am
 		echo "${TEST}_LDADD += \$(top_builddir)/crypto/libcrypto.la" >> Makefile.am
 	done
+	echo "if NO_MEMMEM" >> Makefile.am
 	echo "explicit_bzero_SOURCES += memmem.c" >> Makefile.am
+	echo "endif" >> Makefile.am
 )
 $CP $libcrypto_regress/evp/evptests.txt tests
 $CP $libcrypto_regress/aead/aeadtests.txt tests