diff --git a/crypto/CMakeLists.txt b/crypto/CMakeLists.txt
index bd1a142ef5..b882dbe78c 100644
--- a/crypto/CMakeLists.txt
+++ b/crypto/CMakeLists.txt
@@ -485,6 +485,7 @@ set(
 	evp/pmeth_gn.c
 	evp/pmeth_lib.c
 	hkdf/hkdf.c
+	hkdf/tls1_prf.c
 	hmac/hm_ameth.c
 	hmac/hm_pmeth.c
 	hmac/hmac.c
diff --git a/crypto/Makefile.am b/crypto/Makefile.am
index 357e669f11..3a463efda9 100644
--- a/crypto/Makefile.am
+++ b/crypto/Makefile.am
@@ -687,6 +687,7 @@ noinst_HEADERS += idea/idea_local.h
 # kdf
 libcrypto_la_SOURCES += kdf/hkdf_evp.c
 libcrypto_la_SOURCES += kdf/kdf_err.c
+libcrypto_la_SOURCES += kdf/tls1_prf.c
 
 # lhash
 libcrypto_la_SOURCES += lhash/lhash.c