diff --git a/library/ssl_cookie.c b/library/ssl_cookie.c
index 40b8913..f310a64 100644
--- a/library/ssl_cookie.c
+++ b/library/ssl_cookie.c
@@ -102,19 +102,19 @@
     unsigned char key[COOKIE_MD_OUTLEN];
 
     if( ( ret = f_rng( p_rng, key, sizeof( key ) ) ) != 0 )
-        return( ret );
+        return ret ;
 
     ret = mbedtls_md_setup( &ctx->hmac_ctx, mbedtls_md_info_from_type( COOKIE_MD ), 1 );
     if( ret != 0 )
-        return( ret );
+        return ret ;
 
     ret = mbedtls_md_hmac_starts( &ctx->hmac_ctx, key, sizeof( key ) );
     if( ret != 0 )
-        return( ret );
+        return ret ;
 
     mbedtls_platform_zeroize( key, sizeof( key ) );
 
-    return( 0 );
+    return 0 ;
 }
 
 /*
@@ -134,13 +134,13 @@
         mbedtls_md_hmac_update( hmac_ctx, cli_id, cli_id_len ) != 0 ||
         mbedtls_md_hmac_finish( hmac_ctx, hmac_out ) != 0 )
     {
-        return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
+        return MBEDTLS_ERR_SSL_INTERNAL_ERROR ;
     }
 
     memcpy( *p, hmac_out, COOKIE_HMAC_LEN );
     *p += COOKIE_HMAC_LEN;
 
-    return( 0 );
+    return 0 ;
 }
 
 /*
@@ -155,7 +155,7 @@
     unsigned long t;
 
     if( ctx == NULL || cli_id == NULL )
-        return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
+        return MBEDTLS_ERR_SSL_BAD_INPUT_DATA ;
 
     MBEDTLS_SSL_CHK_BUF_PTR( *p, end, COOKIE_LEN );
 
@@ -173,7 +173,7 @@
 
 #if defined(MBEDTLS_THREADING_C)
     if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_SSL_INTERNAL_ERROR, ret ) );
+        return MBEDTLS_ERROR_ADD( MBEDTLS_ERR_SSL_INTERNAL_ERROR, ret ) ;
 #endif
 
     ret = ssl_cookie_hmac( &ctx->hmac_ctx, *p - 4,
@@ -185,7 +185,7 @@
                 MBEDTLS_ERR_THREADING_MUTEX_ERROR ) );
 #endif
 
-    return( ret );
+    return ret ;
 }
 
 /*
@@ -202,14 +202,14 @@
     unsigned long cur_time, cookie_time;
 
     if( ctx == NULL || cli_id == NULL )
-        return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
+        return MBEDTLS_ERR_SSL_BAD_INPUT_DATA ;
 
     if( cookie_len != COOKIE_LEN )
-        return( -1 );
+        return -1 ;
 
 #if defined(MBEDTLS_THREADING_C)
     if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
-        return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_SSL_INTERNAL_ERROR, ret ) );
+        return MBEDTLS_ERROR_ADD( MBEDTLS_ERR_SSL_INTERNAL_ERROR, ret ) ;
 #endif
 
     if( ssl_cookie_hmac( &ctx->hmac_ctx, cookie,
@@ -224,10 +224,10 @@
 #endif
 
     if( ret != 0 )
-        return( ret );
+        return ret ;
 
     if( mbedtls_ssl_safer_memcmp( cookie + 4, ref_hmac, sizeof( ref_hmac ) ) != 0 )
-        return( -1 );
+        return -1 ;
 
 #if defined(MBEDTLS_HAVE_TIME)
     cur_time = (unsigned long) mbedtls_time( NULL );
@@ -241,8 +241,8 @@
                   ( (unsigned long) cookie[3]       );
 
     if( ctx->timeout != 0 && cur_time - cookie_time > ctx->timeout )
-        return( -1 );
+        return -1 ;
 
-    return( 0 );
+    return 0 ;
 }
 #endif /* MBEDTLS_SSL_COOKIE_C */