diff -ru1 curl-7.69.1/include/curl/curl.h curl-7.69.1-oqs/include/curl/curl.h
--- curl-7.69.1/include/curl/curl.h	2020-03-09 16:31:01.000000000 +0100
+++ curl-7.69.1-oqs/include/curl/curl.h	2020-04-23 08:36:12.113925652 +0200
@@ -1951,2 +1951,5 @@
 
+  /* The (EC) curve [list] to select. */
+  CURLOPT(CURLOPT_CURVES, CURLOPTTYPE_STRINGPOINT, 291),
+
   CURLOPT_LASTENTRY /* the last unused */
diff -ru1 curl-7.69.1/include/curl/typecheck-gcc.h curl-7.69.1-oqs/include/curl/typecheck-gcc.h
--- curl-7.69.1/include/curl/typecheck-gcc.h	2020-03-09 16:31:01.000000000 +0100
+++ curl-7.69.1-oqs/include/curl/typecheck-gcc.h	2020-04-23 08:26:04.119881518 +0200
@@ -258,2 +258,3 @@
    (option) == CURLOPT_CAINFO ||                                              \
+   (option) == CURLOPT_CURVES ||                                              \
    (option) == CURLOPT_CAPATH ||                                              \
diff -ru1 curl-7.69.1/lib/doh.c curl-7.69.1-oqs/lib/doh.c
--- curl-7.69.1/lib/doh.c	2020-03-09 16:31:01.000000000 +0100
+++ curl-7.69.1-oqs/lib/doh.c	2020-04-23 11:45:32.699437012 +0200
@@ -333,2 +333,6 @@
     }
+    if(data->set.str[STRING_SSL_CURVES]) {
+      ERROR_CHECK_SETOPT(CURLOPT_CURVES,
+        data->set.str[STRING_SSL_CURVES]);
+    }
     if(data->set.str[STRING_SSL_CAPATH_ORIG]) {
diff -ru1 curl-7.69.1/lib/setopt.c curl-7.69.1-oqs/lib/setopt.c
--- curl-7.69.1/lib/setopt.c	2020-03-09 16:31:01.000000000 +0100
+++ curl-7.69.1-oqs/lib/setopt.c	2020-04-23 13:33:06.451767244 +0200
@@ -1906,2 +1906,10 @@
     break;
+  case CURLOPT_CURVES:
+    /*
+     * Set accepted curves SSL connection setup.
+     * Specify colon-delimited list of curve algorithm names.
+     */
+    result = Curl_setstropt(&data->set.str[STRING_SSL_CURVES],
+                            va_arg(param, char *));
+    break;
 #ifndef CURL_DISABLE_PROXY
diff -ru1 curl-7.69.1/lib/url.c curl-7.69.1-oqs/lib/url.c
--- curl-7.69.1/lib/url.c	2020-03-09 16:31:01.000000000 +0100
+++ curl-7.69.1-oqs/lib/url.c	2020-04-23 13:27:02.289943670 +0200
@@ -3556,2 +3556,3 @@
   data->set.ssl.primary.CAfile = data->set.str[STRING_SSL_CAFILE_ORIG];
+  data->set.ssl.primary.curves = data->set.str[STRING_SSL_CURVES];
   data->set.proxy_ssl.primary.CAfile = data->set.str[STRING_SSL_CAFILE_PROXY];
diff -ru1 curl-7.69.1/lib/urldata.h curl-7.69.1-oqs/lib/urldata.h
--- curl-7.69.1/lib/urldata.h	2020-03-10 23:54:05.000000000 +0100
+++ curl-7.69.1-oqs/lib/urldata.h	2020-04-23 10:46:24.405234607 +0200
@@ -230,2 +230,3 @@
   char *cipher_list;     /* list of ciphers to use */
+  char *curves;          /* list of curves to use */
   char *cipher_list13;   /* list of TLS 1.3 cipher suites to use */
@@ -1583,2 +1584,3 @@
   STRING_DNS_LOCAL_IP6,
+  STRING_SSL_CURVES,
 
diff -ru1 curl-7.69.1/lib/vtls/openssl.c curl-7.69.1-oqs/lib/vtls/openssl.c
--- curl-7.69.1/lib/vtls/openssl.c	2020-03-09 16:31:01.000000000 +0100
+++ curl-7.69.1-oqs/lib/vtls/openssl.c	2020-04-23 13:30:18.529091612 +0200
@@ -2678,2 +2678,14 @@
 
+  {
+    char *curves = SSL_CONN_CONFIG(curves);
+    if(curves) {
+      if(!SSL_CTX_set1_curves_list(BACKEND->ctx, curves)) {
+        failf(data, "failed setting curves list: '%s'", curves);
+        return CURLE_SSL_CIPHER;
+      }
+    }
+  }
+
+
+
 #ifdef HAVE_SSL_CTX_SET_CIPHERSUITES
diff -ru1 curl-7.69.1/lib/vtls/vtls.c curl-7.69.1-oqs/lib/vtls/vtls.c
--- curl-7.69.1/lib/vtls/vtls.c	2020-03-09 16:31:01.000000000 +0100
+++ curl-7.69.1-oqs/lib/vtls/vtls.c	2020-04-23 11:08:09.247851176 +0200
@@ -119,2 +119,3 @@
   CLONE_STRING(CAfile);
+  CLONE_STRING(curves);
   CLONE_STRING(clientcert);
@@ -133,2 +134,3 @@
   Curl_safefree(sslc->CAfile);
+  Curl_safefree(sslc->curves);
   Curl_safefree(sslc->clientcert);
diff -ru1 curl-7.69.1/src/tool_cfgable.c curl-7.69.1-oqs/src/tool_cfgable.c
--- curl-7.69.1/src/tool_cfgable.c	2020-03-09 16:31:01.000000000 +0100
+++ curl-7.69.1-oqs/src/tool_cfgable.c	2020-04-23 09:22:59.335567962 +0200
@@ -114,2 +114,3 @@
   Curl_safefree(config->cacert);
+  Curl_safefree(config->curves);
   Curl_safefree(config->proxy_cacert);
diff -ru1 curl-7.69.1/src/tool_cfgable.h curl-7.69.1-oqs/src/tool_cfgable.h
--- curl-7.69.1/src/tool_cfgable.h	2020-03-09 16:31:01.000000000 +0100
+++ curl-7.69.1-oqs/src/tool_cfgable.h	2020-04-23 08:31:31.348904910 +0200
@@ -143,2 +143,3 @@
   char *cacert;
+  char *curves;
   char *proxy_cacert;
diff -ru1 curl-7.69.1/src/tool_getparam.c curl-7.69.1-oqs/src/tool_getparam.c
--- curl-7.69.1/src/tool_getparam.c	2020-03-09 16:31:01.000000000 +0100
+++ curl-7.69.1-oqs/src/tool_getparam.c	2020-04-23 13:16:57.139953643 +0200
@@ -272,2 +272,3 @@
   {"ED", "etag-compare",             ARG_FILENAME},
+  {"EE", "curves",                   ARG_STRING},
   {"f",  "fail",                     ARG_BOOL},
@@ -1715,2 +1716,6 @@
         break;
+
+      case 'E':
+        GetStr(&config->curves, nextarg);
+        break;
 
diff -ru1 curl-7.69.1/src/tool_help.c curl-7.69.1-oqs/src/tool_help.c
--- curl-7.69.1/src/tool_help.c	2020-03-09 16:31:01.000000000 +0100
+++ curl-7.69.1-oqs/src/tool_help.c	2020-04-23 13:34:57.981537597 +0200
@@ -63,2 +63,4 @@
    "CA certificate to verify peer against"},
+  {"    --curves <colon-separated-list of curves to select>",
+   "Curves to accept during session setup"},
   {"    --capath <dir>",
diff -ru1 curl-7.69.1/src/tool_operate.c curl-7.69.1-oqs/src/tool_operate.c
--- curl-7.69.1/src/tool_operate.c	2020-03-09 16:31:01.000000000 +0100
+++ curl-7.69.1-oqs/src/tool_operate.c	2020-04-23 13:32:23.995092017 +0200
@@ -1469,2 +1469,4 @@
           my_setopt_str(curl, CURLOPT_CAINFO, config->cacert);
+        if(config->curves)
+          my_setopt_str(curl, CURLOPT_CURVES, config->curves);
         if(config->proxy_cacert)