diff --git a/jni/libzrtp/sources/zrtp/crypto/hmac384.cpp b/jni/libzrtp/sources/zrtp/crypto/hmac384.cpp
index c7a7abd..40b4487 100644
--- a/jni/libzrtp/sources/zrtp/crypto/hmac384.cpp
+++ b/jni/libzrtp/sources/zrtp/crypto/hmac384.cpp
@@ -124,7 +124,7 @@
     hmacSha384Init(&ctx, key, keyLength);
     hmacSha384Update(&ctx, data, dataLength);
     hmacSha384Final(&ctx, mac);
-    *macLength = SHA384_DIGEST_SIZE;
+    *macLength = SHA384_BLOCK_SIZE;
 }
 
 void hmac_sha384( uint8_t* key, uint32_t keyLength, uint8_t* dataChunks[], uint32_t dataChunckLength[],
@@ -140,7 +140,7 @@
         dataChunckLength ++;
     }
     hmacSha384Final(&ctx, mac);
-    *macLength = SHA384_DIGEST_SIZE;
+    *macLength = SHA384_BLOCK_SIZE;
 }
 
 void* createSha384HmacContext(uint8_t* key, int32_t keyLength)
@@ -159,7 +159,7 @@
     hmacSha384Reset(pctx);
     hmacSha384Update(pctx, data, dataLength);
     hmacSha384Final(pctx, mac);
-    *macLength = SHA384_DIGEST_SIZE;
+    *macLength = SHA384_BLOCK_SIZE;
 }
 
 void hmacSha384Ctx(void* ctx, const uint8_t* data[], uint32_t dataLength[],
@@ -174,7 +174,7 @@
         dataLength++;
     }
     hmacSha384Final(pctx, mac);
-    *macLength = SHA384_DIGEST_SIZE;
+    *macLength = SHA384_BLOCK_SIZE;
 }
 
 void freeSha384HmacContext(void* ctx)