diff --git a/thirdparty/mbedtls/include/mbedtls/mbedtls_config.h b/thirdparty/mbedtls/include/mbedtls/mbedtls_config.h
index bba5184a08..72f6608b55 100644
--- a/thirdparty/mbedtls/include/mbedtls/mbedtls_config.h
+++ b/thirdparty/mbedtls/include/mbedtls/mbedtls_config.h
@@ -1903,7 +1903,7 @@
  *
  * Uncomment this to enable pthread mutexes.
  */
-#if ( defined(__linux__) || defined(__FreeBSD__) )
+#if ( defined(__linux__) || defined(__FreeBSD__) ) || defined (__OpenBSD__)
 #define MBEDTLS_THREADING_PTHREAD
 #endif
 
@@ -3285,7 +3285,7 @@
  *
  * Enable this layer to allow use of mutexes within mbed TLS
  */
-#if ( defined(__linux__) || defined(__FreeBSD__) )
+#if ( defined(__linux__) || defined(__FreeBSD__) ) || defined (__OpenBSD__)
 #define MBEDTLS_THREADING_C
 #endif