diff --git a/common/ssl_calls.c b/common/ssl_calls.c
index bd2181c0..de447e46 100644
--- a/common/ssl_calls.c
+++ b/common/ssl_calls.c
@@ -32,6 +32,7 @@
 #include <openssl/hmac.h>
 #include <openssl/bn.h>
 #include <openssl/rsa.h>
+# include <openssl/dh.h>
 
 #include "os_calls.h"
 #include "arch.h"
@@ -485,6 +486,60 @@ ssl_gen_key_xrdp1(int key_size_in_bits, const char *exp, int exp_len,
     return error;
 }
 
+/*****************************************************************************/
+/** static DH parameter, can be used if no custom parameter is specified
+see also 
+ * https://wiki.openssl.org/index.php/Diffie-Hellman_parameters
+ * https://wiki.openssl.org/index.php/Manual:SSL_CTX_set_tmp_dh_callback(3)
+*/
+DH *get_dh2236()
+{
+    static unsigned char dhp_2236[] = {
+        0x0A, 0x32, 0x29, 0xCA, 0x5A, 0x84, 0x4C, 0xD2, 0x66, 0x61,
+        0x29, 0xAD, 0x46, 0xD7, 0xFB, 0x3A, 0x1E, 0x92, 0x8D, 0x3F,
+        0xC8, 0x16, 0x41, 0x83, 0x0C, 0xA1, 0x96, 0x29, 0xD9, 0x0B,
+        0x28, 0x3F, 0x9A, 0x1F, 0xDA, 0x81, 0x9F, 0xD2, 0x3E, 0xE4,
+        0xFA, 0x94, 0xDF, 0x35, 0x7F, 0x7F, 0xBB, 0x23, 0xA4, 0xB2,
+        0x66, 0x50, 0x64, 0x3E, 0xCD, 0x50, 0xAE, 0xEC, 0x51, 0xE1,
+        0x12, 0x41, 0xB7, 0xC4, 0xF9, 0x79, 0xC7, 0x3D, 0x80, 0x16,
+        0xE2, 0xA8, 0x4B, 0xCA, 0x0B, 0x2A, 0xA3, 0xC1, 0x93, 0xCD,
+        0x15, 0x2C, 0xE3, 0x81, 0x92, 0x0A, 0x4C, 0x59, 0x88, 0x07,
+        0xC3, 0x18, 0xCC, 0x9B, 0xCE, 0x74, 0x7A, 0x80, 0x3A, 0x85,
+        0x6E, 0xF3, 0x81, 0x2B, 0xD3, 0x84, 0x6C, 0xBC, 0xB6, 0xE2,
+        0x51, 0xCD, 0x20, 0x4B, 0x3C, 0x45, 0x03, 0xDB, 0xA9, 0xB4,
+        0xFB, 0x95, 0x54, 0x16, 0x46, 0xA7, 0x7F, 0x03, 0xFC, 0xBB,
+        0xA1, 0xF7, 0x71, 0x10, 0xCB, 0x58, 0x21, 0x5C, 0xF4, 0x89,
+        0x52, 0x91, 0xAC, 0x69, 0x84, 0xA0, 0x6D, 0x88, 0xC8, 0x05,
+        0x2B, 0x23, 0x0B, 0x88, 0xB2, 0xE7, 0xE8, 0x28, 0x7E, 0x0D,
+        0x01, 0xBF, 0xBF, 0xCD, 0xC8, 0xD7, 0xE8, 0x2C, 0x6C, 0xE3,
+        0x58, 0xFD, 0x37, 0x9D, 0x31, 0x98, 0xAC, 0xC3, 0x49, 0x8E,
+        0x0B, 0x66, 0x86, 0xE7, 0xD2, 0xE5, 0xD6, 0x1D, 0x95, 0x1F,
+        0xD2, 0x84, 0xE5, 0x68, 0x76, 0x5C, 0x40, 0xB9, 0xF1, 0x58,
+        0xD2, 0x33, 0x2D, 0x92, 0x1F, 0xA1, 0x8A, 0xD1, 0xE6, 0x35,
+        0xC2, 0xBF, 0xBF, 0xD8, 0x63, 0xB5, 0x8E, 0x3D, 0x50, 0xD2,
+        0x80, 0x67, 0x5B, 0x04, 0x4F, 0x33, 0x20, 0xAF, 0xA1, 0xE9,
+        0xB5, 0xA6, 0x7A, 0x17, 0x8E, 0xC2, 0x3D, 0xFF, 0xB6, 0x81,
+        0x2A, 0xA8, 0x13, 0x32, 0x78, 0x8B, 0x38, 0x09, 0x8F, 0x54,
+        0x5D, 0x6F, 0x3E, 0x84, 0x93, 0x49, 0x96, 0x26, 0x4E, 0x68,
+        0x82, 0x42, 0x40, 0xD9, 0x30, 0xA3, 0x90, 0x6B, 0x99, 0x1B,
+        0x11, 0x3A, 0x36, 0xE9, 0xD8, 0x52, 0x8A, 0x85, 0xDD, 0xB3
+    };
+    static unsigned char dhg_2236[] = {
+        0x02
+    };
+    DH *dh = DH_new();
+
+    if (dh == NULL)
+        return NULL;
+    dh->p=BN_bin2bn(dhp_2236,sizeof(dhp_2236),NULL);
+    dh->g=BN_bin2bn(dhg_2236,sizeof(dhg_2236),NULL);
+    if (dh->p == NULL || dh->g == NULL) {
+        DH_free(dh);
+        return NULL;
+    }
+    return dh;
+}
+
 /*****************************************************************************/
 struct ssl_tls *
 ssl_tls_create(struct trans *trans, const char *key, const char *cert)
@@ -592,6 +647,12 @@ ssl_tls_accept(struct ssl_tls *self, long ssl_protocols,
                      SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER |
                      SSL_MODE_ENABLE_PARTIAL_WRITE);
     SSL_CTX_set_options(self->ctx, options);
+    DH *dh = get_dh2236 ();
+    if (SSL_CTX_set_tmp_dh(self->ctx, dh) != 1) {
+        g_writeln("SSL_CTX_set_tmp_dh failed");
+        return 1;
+    }
+    DH_free (dh);
 #if defined(SSL_CTX_set_ecdh_auto)
     SSL_CTX_set_ecdh_auto(self->ctx, 1);
 #endif