diff --git a/src/libsodium/Makefile.am b/src/libsodium/Makefile.am
index 2fc79b88..90efeda7 100644
--- a/src/libsodium/Makefile.am
+++ b/src/libsodium/Makefile.am
@@ -220,7 +220,7 @@ libsodium_la_SOURCES += \
 	crypto_scalarmult/curve25519/sandy2x/ladder_base.h \
 	crypto_scalarmult/curve25519/sandy2x/ladder_base_namespace.h \
 	crypto_scalarmult/curve25519/sandy2x/ladder_namespace.h \
-	crypto_scalarmult/curve25519/sandy2x/sandy2x.S \
+	crypto_scalarmult/curve25519/sandy2x/sandy2x.S
 else
 libsodium_la_SOURCES += \
 	crypto_stream/salsa20/ref/api.h \