diff --git a/ssl/CMakeLists.txt b/ssl/CMakeLists.txt
index 39f8192..015cb62 100644
--- a/ssl/CMakeLists.txt
+++ b/ssl/CMakeLists.txt
@@ -38,6 +38,7 @@ set(
 	ssl_versions.c
 	t1_enc.c
 	t1_lib.c
+	tls12_record_layer.c
 	tls13_buffer.c
 	tls13_client.c
 	tls13_error.c
diff --git a/ssl/Makefile.am b/ssl/Makefile.am
index a7bb8a3..dded59f 100644
--- a/ssl/Makefile.am
+++ b/ssl/Makefile.am
@@ -47,6 +47,7 @@ libssl_la_SOURCES += ssl_txt.c
 libssl_la_SOURCES += ssl_versions.c
 libssl_la_SOURCES += t1_enc.c
 libssl_la_SOURCES += t1_lib.c
+libssl_la_SOURCES += tls12_record_layer.c
 libssl_la_SOURCES += tls13_buffer.c
 libssl_la_SOURCES += tls13_client.c
 libssl_la_SOURCES += tls13_error.c