diff --git a/talk/session/media/externalhmac.cc b/talk/session/media/externalhmac.cc
index 82d316d..9c204b7 100644
--- a/talk/session/media/externalhmac.cc
+++ b/talk/session/media/externalhmac.cc
@@ -98,7 +98,7 @@
     return err_status_bad_param;
 
   // Allocate memory for auth and hmac_ctx_t structures.
-  pointer = new uint8_t[(sizeof(external_hmac_ctx_t) + sizeof(auth_t))];
+  pointer = new uint8_t[(sizeof(ExternalHmacContext) + sizeof(auth_t))];
   if (pointer == NULL)
     return err_status_alloc_fail;
 
@@ -118,7 +118,7 @@
 
 err_status_t external_hmac_dealloc(auth_t* a) {
   // Zeroize entire state
-  memset((uint8_t *)a, 0, sizeof(external_hmac_ctx_t) + sizeof(auth_t));
+  memset((uint8_t *)a, 0, sizeof(ExternalHmacContext) + sizeof(auth_t));
 
   // Free memory
   delete[] a;
@@ -126,7 +126,7 @@
   return err_status_ok;
 }
 
-err_status_t external_hmac_init(external_hmac_ctx_t* state,
+err_status_t external_hmac_init(ExternalHmacContext* state,
                                 const uint8_t* key,
                                 int key_len) {
   if (key_len > HMAC_KEY_LENGTH)
@@ -138,17 +138,17 @@
   return err_status_ok;
 }
 
-err_status_t external_hmac_start(external_hmac_ctx_t* state) {
+err_status_t external_hmac_start(ExternalHmacContext* state) {
   return err_status_ok;
 }
 
-err_status_t external_hmac_update(external_hmac_ctx_t* state,
+err_status_t external_hmac_update(ExternalHmacContext* state,
                                   const uint8_t* message,
                                   int msg_octets) {
   return err_status_ok;
 }
 
-err_status_t external_hmac_compute(external_hmac_ctx_t* state,
+err_status_t external_hmac_compute(ExternalHmacContext* state,
                                    const void* message,
                                    int msg_octets,
                                    int tag_len,
diff --git a/talk/session/media/externalhmac.h b/talk/session/media/externalhmac.h
index 0ab1919..740570b 100644
--- a/talk/session/media/externalhmac.h
+++ b/talk/session/media/externalhmac.h
@@ -62,23 +62,23 @@
 typedef struct {
   uint8 key[HMAC_KEY_LENGTH];
   int key_length;
-} external_hmac_ctx_t;
+} ExternalHmacContext;
 
 err_status_t external_hmac_alloc(auth_t** a, int key_len, int out_len);
 
 err_status_t external_hmac_dealloc(auth_t* a);
 
-err_status_t external_hmac_init(external_hmac_ctx_t* state,
+err_status_t external_hmac_init(ExternalHmacContext* state,
                                 const uint8_t* key,
                                 int key_len);
 
-err_status_t external_hmac_start(external_hmac_ctx_t* state);
+err_status_t external_hmac_start(ExternalHmacContext* state);
 
-err_status_t external_hmac_update(external_hmac_ctx_t* state,
+err_status_t external_hmac_update(ExternalHmacContext* state,
                                   const uint8_t* message,
                                   int msg_octets);
 
-err_status_t external_hmac_compute(external_hmac_ctx_t* state,
+err_status_t external_hmac_compute(ExternalHmacContext* state,
                                    const void* message,
                                    int msg_octets,
                                    int tag_len,
diff --git a/talk/session/media/srtpfilter.cc b/talk/session/media/srtpfilter.cc
index 5a774db..b3c6dc2 100644
--- a/talk/session/media/srtpfilter.cc
+++ b/talk/session/media/srtpfilter.cc
@@ -598,12 +598,12 @@
 bool SrtpSession::GetRtpAuthParams(uint8** key, int* key_len,
                                    int* tag_len) {
 #if defined(ENABLE_EXTERNAL_AUTH)
-  external_hmac_ctx_t* external_hmac = NULL;
+  ExternalHmacContext* external_hmac = NULL;
   // stream_template will be the reference context for other streams.
   // Let's use it for getting the keys.
   srtp_stream_ctx_t* srtp_context = session_->stream_template;
   if (srtp_context && srtp_context->rtp_auth) {
-    external_hmac = reinterpret_cast<external_hmac_ctx_t*>(
+    external_hmac = reinterpret_cast<ExternalHmacContext*>(
         srtp_context->rtp_auth->state);
   }