diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index dd365b7..069bd44 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -1873,7 +1873,7 @@
     eap_tls_keys eap_tls_keying;
 #if defined( MBEDTLS_SSL_DTLS_SRTP )
     /*! master keys and master salt for SRTP generated during handshake */
-     unsigned char dtls_srtp_key_material[MBEDTLS_DTLS_SRTP_MAX_KEY_MATERIAL_LENGTH];
+     unsigned char dtls_srtp_key_material[MBEDTLS_TLS_SRTP_MAX_KEY_MATERIAL_LENGTH];
      const char* dtls_srtp_label = "EXTRACTOR-dtls_srtp";
      dtls_srtp_keys dtls_srtp_keying;
 #endif /* MBEDTLS_SSL_DTLS_SRTP */