diff --git a/include/coap/hashkey.h b/include/coap/hashkey.h
index a5d1f008..68a97fc8 100644
--- a/include/coap/hashkey.h
+++ b/include/coap/hashkey.h
@@ -3,10 +3,10 @@
  * Copyright (C) 2010,2011 Olaf Bergmann <bergmann@tzi.org>
  *
  * This file is part of the CoAP library libcoap. Please see
- * README for terms of use. 
+ * README for terms of use.
  */
 
-/** 
+/**
  * @file hashkey.h
  * @brief definition of hash key type and helper functions
  */
@@ -19,12 +19,11 @@
 typedef unsigned char coap_key_t[4];
 
 #ifndef coap_hash
-/** 
- * Calculates a fast hash over the given string @p s of length @p len
- * and stores the result into @p h. Depending on the exact
- * implementation, this function cannot be used as one-way function to
- * check message integrity or simlar.
- * 
+/**
+ * Calculates a fast hash over the given string @p s of length @p len and stores
+ * the result into @p h. Depending on the exact implementation, this function
+ * cannot be used as one-way function to check message integrity or simlar.
+ *
  * @param s   The string used for hash calculation.
  * @param len The length of @p s.
  * @param h   The result buffer to store the calculated hash key.
@@ -40,18 +39,18 @@ void coap_hash_impl(const unsigned char *s, unsigned int len, coap_key_t h);
 #undef __COAP_DEFAULT_HASH
 #endif /* coap_hash */
 
-/** 
+/**
  * Calls coap_hash() with given @c str object as parameter.
- * 
+ *
  * @param Str Must contain a pointer to a coap string object.
  * @param H   A coap_key_t object to store the result.
- * 
+ *
  * @hideinitializer
  */
-#define coap_str_hash(Str,H) {			\
-    assert(Str);				\
-    memset((H), 0, sizeof(coap_key_t));		\
-    coap_hash((Str)->s, (Str)->length, (H));	\
+#define coap_str_hash(Str,H) {               \
+    assert(Str);                             \
+    memset((H), 0, sizeof(coap_key_t));      \
+    coap_hash((Str)->s, (Str)->length, (H)); \
   }
 
 #endif /* _COAP_HASHKEY_H_ */