diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index c011b9e4d9..d88e67cec5 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -5408,10 +5408,10 @@ int  mbedtls_ssl_tls_prf(const mbedtls_tls_prf_types prf,
  * \return            0 on success. An SSL specific error on failure.
  */
 int mbedtls_ssl_export_keying_material(mbedtls_ssl_context *ssl,
-                                        uint8_t *out, const size_t key_len,
-                                        const char *label, const size_t label_len,
-                                        const unsigned char *context, const size_t context_len,
-                                        const int use_context);
+                                       uint8_t *out, const size_t key_len,
+                                       const char *label, const size_t label_len,
+                                       const unsigned char *context, const size_t context_len,
+                                       const int use_context);
 #ifdef __cplusplus
 }
 #endif