diff --git a/src/libsodium/Makefile.am b/src/libsodium/Makefile.am
index 3cbb376e..f34306c7 100644
--- a/src/libsodium/Makefile.am
+++ b/src/libsodium/Makefile.am
@@ -62,6 +62,7 @@ libsodium_la_SOURCES = \
 	crypto_onetimeauth/poly1305/donna/auth_poly1305_donna.c \
 	crypto_onetimeauth/poly1305/donna/verify_poly1305_donna.c \
 	crypto_scalarmult/crypto_scalarmult.c \
+	crypto_scalarmult/curve25519/scalarmult_curve25519_api.c \
 	crypto_secretbox/crypto_secretbox.c \
 	crypto_secretbox/xsalsa20poly1305/secretbox_xsalsa20poly1305_api.c \
 	crypto_secretbox/xsalsa20poly1305/ref/api.h \