diff --git a/CHANGES b/CHANGES
index 591f132..2d81f95 100644
--- a/CHANGES
+++ b/CHANGES
@@ -18,6 +18,10 @@ porting:
 	compilation on FreeBSD 10.1 with clang. Thanks to Emanuel Haupt for
 	reporting this bug.
 
+	Socat failed to compile on platforms with OpenSSL without
+	DTLSv1_client_method or DTLSv1_server_method.
+	Thanks to Simon Matter for sending a patch.
+
 testing:
 	socks4echo.sh and socks4a-echo.sh hung with new bash with read -n
 
diff --git a/sslcls.c b/sslcls.c
index 3d5792a..db8f02f 100644
--- a/sslcls.c
+++ b/sslcls.c
@@ -143,6 +143,7 @@ const SSL_METHOD *sycTLSv1_2_server_method(void) {
 }
 #endif
 
+#if HAVE_DTLSv1_client_method
 const SSL_METHOD *sycDTLSv1_client_method(void) {
    const SSL_METHOD *result;
    Debug("DTLSv1_client_method()");
@@ -150,7 +151,9 @@ const SSL_METHOD *sycDTLSv1_client_method(void) {
    Debug1("DTLSv1_client_method() -> %p", result);
    return result;
 }
+#endif
 
+#if HAVE_DTLSv1_server_method
 const SSL_METHOD *sycDTLSv1_server_method(void) {
    const SSL_METHOD *result;
    Debug("DTLSv1_server_method()");
@@ -158,6 +161,7 @@ const SSL_METHOD *sycDTLSv1_server_method(void) {
    Debug1("DTLSv1_server_method() -> %p", result);
    return result;
 }
+#endif
 
 SSL_CTX *sycSSL_CTX_new(const SSL_METHOD *method) {
    SSL_CTX *result;