diff --git a/library/cipher.c b/library/cipher.c
index 0c5bcda..4ec40d2 100644
--- a/library/cipher.c
+++ b/library/cipher.c
@@ -1146,7 +1146,10 @@
 
         /* Check the tag in "constant-time" */
         if( mbedtls_ct_memcmp( tag, check_tag, tag_len ) != 0 )
+        {
             ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
+            goto exit;
+        }
     }
 #endif /* MBEDTLS_GCM_C */
 
@@ -1166,10 +1169,14 @@
 
         /* Check the tag in "constant-time" */
         if( mbedtls_ct_memcmp( tag, check_tag, tag_len ) != 0 )
+        {
             ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
+            goto exit;
+        }
     }
 #endif /* MBEDTLS_CHACHAPOLY_C */
 
+exit:
     mbedtls_platform_zeroize( check_tag, tag_len );
     return( ret );
 }