diff --git a/libtls-standalone/src/Makefile.am b/libtls-standalone/src/Makefile.am
index 7844525..5f8f55f 100644
--- a/libtls-standalone/src/Makefile.am
+++ b/libtls-standalone/src/Makefile.am
@@ -8,6 +8,7 @@ libtls_la_LIBADD += $(top_builddir)/compat/libcompat.la
 libtls_la_LIBADD += $(top_builddir)/compat/libcompatnoopt.la
 
 libtls_la_SOURCES = tls.c
+libtls_la_SOURCES += tls_bio_cb.c
 libtls_la_SOURCES += tls_client.c
 libtls_la_SOURCES += tls_config.c
 libtls_la_SOURCES += tls_server.c
diff --git a/tls/CMakeLists.txt b/tls/CMakeLists.txt
index 53c8be7..8079cae 100644
--- a/tls/CMakeLists.txt
+++ b/tls/CMakeLists.txt
@@ -7,6 +7,7 @@ include_directories(
 set(
 	TLS_SRC
 	tls.c
+	tls_bio_cb.c
 	tls_client.c
 	tls_config.c
 	tls_conninfo.c
diff --git a/tls/Makefile.am b/tls/Makefile.am
index b7dd4b0..8350e4d 100644
--- a/tls/Makefile.am
+++ b/tls/Makefile.am
@@ -19,6 +19,7 @@ endif
 
 libtls_la_SOURCES = tls.c
 libtls_la_SOURCES += tls_client.c
+libtls_la_SOURCES += tls_bio_cb.c
 libtls_la_SOURCES += tls_config.c
 libtls_la_SOURCES += tls_conninfo.c
 libtls_la_SOURCES += tls_server.c