diff --git a/src/libsodium/include/sodium/crypto_stream.h b/src/libsodium/include/sodium/crypto_stream.h
index 9ac6a259..8150a2fc 100644
--- a/src/libsodium/include/sodium/crypto_stream.h
+++ b/src/libsodium/include/sodium/crypto_stream.h
@@ -1,6 +1,14 @@
 #ifndef crypto_stream_H
 #define crypto_stream_H
 
+/*
+ *  WARNING: This is just a stream cipher. It is NOT authenticated encryption.
+ *  While it provides some protection against eavesdropping, it does NOT
+ *  provide any security against active attacks.
+ *  Unless you know what you're doing, what you are looking for is probably
+ *  the crypto_box functions.
+ */
+
 #include <stdlib.h>
 
 #include "crypto_stream_xsalsa20.h"
diff --git a/src/libsodium/include/sodium/crypto_stream_aes128ctr.h b/src/libsodium/include/sodium/crypto_stream_aes128ctr.h
index dccf6a0f..c8cf836b 100644
--- a/src/libsodium/include/sodium/crypto_stream_aes128ctr.h
+++ b/src/libsodium/include/sodium/crypto_stream_aes128ctr.h
@@ -1,6 +1,14 @@
 #ifndef crypto_stream_aes128ctr_H
 #define crypto_stream_aes128ctr_H
 
+/*
+ *  WARNING: This is just a stream cipher. It is NOT authenticated encryption.
+ *  While it provides some protection against eavesdropping, it does NOT
+ *  provide any security against active attacks.
+ *  Unless you know what you're doing, what you are looking for is probably
+ *  the crypto_box functions.
+ */
+
 #include "export.h"
 
 #define crypto_stream_aes128ctr_KEYBYTES 16
@@ -11,7 +19,6 @@
 extern "C" {
 #endif
 
-
 SODIUM_EXPORT
 int crypto_stream_aes128ctr(unsigned char *,unsigned long long,const unsigned char *,const unsigned char *);
 
diff --git a/src/libsodium/include/sodium/crypto_stream_salsa20.h b/src/libsodium/include/sodium/crypto_stream_salsa20.h
index c97f6ba6..61b77d3c 100644
--- a/src/libsodium/include/sodium/crypto_stream_salsa20.h
+++ b/src/libsodium/include/sodium/crypto_stream_salsa20.h
@@ -1,6 +1,14 @@
 #ifndef crypto_stream_salsa20_H
 #define crypto_stream_salsa20_H
 
+/*
+ *  WARNING: This is just a stream cipher. It is NOT authenticated encryption.
+ *  While it provides some protection against eavesdropping, it does NOT
+ *  provide any security against active attacks.
+ *  Unless you know what you're doing, what you are looking for is probably
+ *  the crypto_box functions.
+ */
+
 #include "export.h"
 
 #define crypto_stream_salsa20_KEYBYTES 32
diff --git a/src/libsodium/include/sodium/crypto_stream_salsa2012.h b/src/libsodium/include/sodium/crypto_stream_salsa2012.h
index 007ca34c..737dd183 100644
--- a/src/libsodium/include/sodium/crypto_stream_salsa2012.h
+++ b/src/libsodium/include/sodium/crypto_stream_salsa2012.h
@@ -1,6 +1,14 @@
 #ifndef crypto_stream_salsa2012_H
 #define crypto_stream_salsa2012_H
 
+/*
+ *  WARNING: This is just a stream cipher. It is NOT authenticated encryption.
+ *  While it provides some protection against eavesdropping, it does NOT
+ *  provide any security against active attacks.
+ *  Unless you know what you're doing, what you are looking for is probably
+ *  the crypto_box functions.
+ */
+
 #include "export.h"
 
 #define crypto_stream_salsa2012_KEYBYTES 32
diff --git a/src/libsodium/include/sodium/crypto_stream_salsa208.h b/src/libsodium/include/sodium/crypto_stream_salsa208.h
index 06689385..fd055525 100644
--- a/src/libsodium/include/sodium/crypto_stream_salsa208.h
+++ b/src/libsodium/include/sodium/crypto_stream_salsa208.h
@@ -1,6 +1,14 @@
 #ifndef crypto_stream_salsa208_H
 #define crypto_stream_salsa208_H
 
+/*
+ *  WARNING: This is just a stream cipher. It is NOT authenticated encryption.
+ *  While it provides some protection against eavesdropping, it does NOT
+ *  provide any security against active attacks.
+ *  Unless you know what you're doing, what you are looking for is probably
+ *  the crypto_box functions.
+ */
+
 #include "export.h"
 
 #define crypto_stream_salsa208_KEYBYTES 32
diff --git a/src/libsodium/include/sodium/crypto_stream_xsalsa20.h b/src/libsodium/include/sodium/crypto_stream_xsalsa20.h
index f792abca..2f5859e8 100644
--- a/src/libsodium/include/sodium/crypto_stream_xsalsa20.h
+++ b/src/libsodium/include/sodium/crypto_stream_xsalsa20.h
@@ -1,6 +1,14 @@
 #ifndef crypto_stream_xsalsa20_H
 #define crypto_stream_xsalsa20_H
 
+/*
+ *  WARNING: This is just a stream cipher. It is NOT authenticated encryption.
+ *  While it provides some protection against eavesdropping, it does NOT
+ *  provide any security against active attacks.
+ *  Unless you know what you're doing, what you are looking for is probably
+ *  the crypto_box functions.
+ */
+
 #include "export.h"
 
 #define crypto_stream_xsalsa20_KEYBYTES 32