| Index: webrtc/pc/externalhmac.h
 | 
| diff --git a/webrtc/pc/externalhmac.h b/webrtc/pc/externalhmac.h
 | 
| index c0f2ce1ff6fe37e8b3d6ea2f984428e211c7bfcc..2666d90cb8ee718063ed561e26edbd14e8fad11c 100644
 | 
| --- a/webrtc/pc/externalhmac.h
 | 
| +++ b/webrtc/pc/externalhmac.h
 | 
| @@ -34,7 +34,7 @@
 | 
|  #include "third_party/libsrtp/crypto/include/auth.h"
 | 
|  #endif  // HAVE_SRTP
 | 
|  
 | 
| -#if defined(HAVE_SRTP)
 | 
| +#if defined(HAVE_SRTP) && defined(ENABLE_EXTERNAL_AUTH)
 | 
|  
 | 
|  #define EXTERNAL_HMAC_SHA1 SRTP_HMAC_SHA1 + 1
 | 
|  #define HMAC_KEY_LENGTH 20
 | 
| @@ -71,5 +71,5 @@
 | 
|  
 | 
|  srtp_err_status_t external_crypto_init();
 | 
|  
 | 
| -#endif  // defined(HAVE_SRTP)
 | 
| +#endif  // defined(HAVE_SRTP) && defined(ENABLE_EXTERNAL_AUTH)
 | 
|  #endif  // WEBRTC_PC_EXTERNALHMAC_H_
 | 
| 
 |