diff --git a/cryptography/hazmat/primitives/padding.py b/cryptography/hazmat/primitives/padding.py
index 9729827..e517dee 100644
--- a/cryptography/hazmat/primitives/padding.py
+++ b/cryptography/hazmat/primitives/padding.py
@@ -37,7 +37,8 @@
     return Cryptography_DUPLICATE_MSB_TO_ALL(a);
 }
 
-uint8_t Cryptography_check_pkcs7_padding(const uint8_t *data, uint8_t block_len) {
+uint8_t Cryptography_check_pkcs7_padding(const uint8_t *data,
+                                         uint8_t block_len) {
     uint8_t i;
     uint8_t pad_size = data[block_len - 1];
     uint8_t mismatch = 0;