diff --git a/auto/lib/md5/conf b/auto/lib/md5/conf
index 1a54ed5..ab8b51b 100644
--- a/auto/lib/md5/conf
+++ b/auto/lib/md5/conf
@@ -1,5 +1,5 @@
 
-if [ $MD5 != NO ]; then
+if [ $MD5 != NONE ]; then
 
     if grep MD5_Init $MD5/md5.h >/dev/null; then
         # OpenSSL md5
@@ -25,6 +25,8 @@
 ngx_lib_inc="#include <sys/types.h>
 #include <md5.h>"
 
+    MD5=NO
+
         # Solaris 8/9
         ngx_lib="rsaref md5"
         ngx_lib_test="MD5_CTX md5; MD5Init(&md5)"