--- a/configure.ac	2026-05-11 11:35:37
+++ b/configure.ac	2026-05-11 11:36:20
@@ -184,9 +184,12 @@
 	[if test "x$xenable_internal_md5" != "xyes"; then
 	    if test "x$have_crypto" != "xyes" && test "x$have_md5" != "xyes"; then
 	        LIBS="$LIBS -lcrypto"
-	        have_md2=yes
 	    fi
-	    AC_DEFINE(HAVE_CRYPTO_MD2, [1], [Define to 1 if libcrypto supports MD2.])
+	    AC_CHECK_HEADER([openssl/md2.h],
+	        [have_md2=yes
+	         AC_DEFINE(HAVE_CRYPTO_MD2, [1],
+	            [Define to 1 if libcrypto supports MD2.])],
+	        [have_md2=no])
 	fi],
 	[], [-lcrypto])