diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 73ffdef..e5ec131 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -65,6 +65,16 @@
 #define inline __inline
 #endif
 
+/* Legacy minor version numbers as defined by:
+ * - RFC 2246: ProtocolVersion version = { 3, 1 };     // TLS v1.0
+ * - RFC 4346: ProtocolVersion version = { 3, 2 };     // TLS v1.1
+ *
+ * We no longer support these versions, but some code still references those
+ * constants, for keep them for now until we clean up that code.
+ */
+#define MBEDTLS_SSL_MINOR_VERSION_1             1
+#define MBEDTLS_SSL_MINOR_VERSION_2             2
+
 /* Determine minimum supported version */
 #define MBEDTLS_SSL_MIN_MAJOR_VERSION           MBEDTLS_SSL_MAJOR_VERSION_3