diff --git a/shim.c b/shim.c
index b27a5743..ae951029 100644
--- a/shim.c
+++ b/shim.c
@@ -476,11 +476,19 @@ int X_SSL_CTX_new_index() {
 }
 
 int X_SSL_CTX_set_min_proto_version(SSL_CTX *ctx, int version) {
+#if OPENSSL_VERSION_NUMBER >= 0x1010000fL
 	return SSL_CTX_set_min_proto_version(ctx, version);
+#else
+	return 0;
+#endif
 }
 
 int X_SSL_CTX_set_max_proto_version(SSL_CTX *ctx, int version) {
+#if OPENSSL_VERSION_NUMBER >= 0x1010000fL
 	return SSL_CTX_set_max_proto_version(ctx, version);
+#else
+	return 0;
+#endif
 }
 
 long X_SSL_CTX_set_options(SSL_CTX* ctx, long options) {
diff --git a/shim.h b/shim.h
index 94fe8c61..fbd2b26b 100644
--- a/shim.h
+++ b/shim.h
@@ -67,6 +67,9 @@ extern int X_SSL_verify_cb(int ok, X509_STORE_CTX* store);
 
 /* SSL_CTX methods */
 extern int X_SSL_CTX_new_index();
+#ifndef TLS1_3_VERSION
+#define TLS1_3_VERSION 0
+#endif
 extern int X_SSL_CTX_set_min_proto_version(SSL_CTX *ctx, int version);
 extern int X_SSL_CTX_set_max_proto_version(SSL_CTX *ctx, int version);
 extern long X_SSL_CTX_set_options(SSL_CTX* ctx, long options);
@@ -181,4 +184,4 @@ extern int OBJ_create(const char *oid,const char *sn,const char *ln);
 
 /* Extension helper method */
 extern const unsigned char * get_extention(X509 *x, int NID, int *data_len);
-extern int add_custom_ext(X509 *cert, int nid, char *value, int len);
\ No newline at end of file
+extern int add_custom_ext(X509 *cert, int nid, char *value, int len);