diff --git a/ChangeLog b/ChangeLog
index a688334f..c862b914 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -5,7 +5,7 @@
  - big-endian architectures are now supported as well
  - The donna_c64 implementation of curve25519_donna_c64 now handles
 non-canonical points like the ref implementation
- - Missing scalarmult_curve25519 constants are now exported
+ - Missing scalarmult_curve25519 and stream_salsa20 constants are now exported
  - A crypto_onetimeauth_poly1305_ref() wrapper has been added
 
 * Version 0.4.3
diff --git a/src/libsodium/Makefile.am b/src/libsodium/Makefile.am
index f34306c7..b108f6e6 100644
--- a/src/libsodium/Makefile.am
+++ b/src/libsodium/Makefile.am
@@ -159,6 +159,7 @@ libsodium_la_SOURCES = \
 	crypto_stream/aes256estream/stream_aes256estream_api.c \
 	crypto_stream/aes256estream/hongjun/api.h \
 	crypto_stream/aes256estream/hongjun/ecrypt-sync.h \
+	crypto_stream/salsa20/stream_salsa20_api.c \
 	crypto_stream/salsa2012/stream_salsa2012_api.c \
 	crypto_stream/salsa2012/ref/api.h \
 	crypto_stream/salsa2012/ref/stream_salsa2012.c \
diff --git a/src/libsodium/crypto_stream/salsa20/stream_salsa20_api.c b/src/libsodium/crypto_stream/salsa20/stream_salsa20_api.c
index 037fb59d..fce456e4 100644
--- a/src/libsodium/crypto_stream/salsa20/stream_salsa20_api.c
+++ b/src/libsodium/crypto_stream/salsa20/stream_salsa20_api.c
@@ -1 +1,16 @@
 #include "crypto_stream_salsa20.h"
+
+size_t
+crypto_stream_salsa20_keybytes(void) {
+    return crypto_stream_salsa20_KEYBYTES;
+}
+
+size_t
+crypto_stream_salsa20_noncebytes(void) {
+    return crypto_stream_salsa20_NONCEBYTES;
+}
+
+const char *
+crypto_stream_salsa20_primitive(void) {
+    return "salsa20";
+}
diff --git a/src/libsodium/include/sodium/crypto_stream_salsa20.h.in b/src/libsodium/include/sodium/crypto_stream_salsa20.h.in
index 9f8e9df2..b55e0ef3 100644
--- a/src/libsodium/include/sodium/crypto_stream_salsa20.h.in
+++ b/src/libsodium/include/sodium/crypto_stream_salsa20.h.in
@@ -15,15 +15,24 @@
 # endif
 #endif
 
+#include <stddef.h>
 #include "export.h"
 
-#define crypto_stream_salsa20_KEYBYTES 32U
-#define crypto_stream_salsa20_NONCEBYTES 8U
-
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+#define crypto_stream_salsa20_KEYBYTES 32U
+SODIUM_EXPORT
+size_t crypto_stream_salsa20_keybytes(void);
+
+#define crypto_stream_salsa20_NONCEBYTES 8U
+SODIUM_EXPORT
+size_t crypto_stream_salsa20_noncebytes(void);
+
+SODIUM_EXPORT
+const char * crypto_stream_salsa20_primitive(void);
+
 SODIUM_EXPORT
 int crypto_stream_salsa20(unsigned char *,unsigned long long,const unsigned char *,const unsigned char *);