diff --git a/src/hash.h b/src/hash.h
index 667d6508..f5b9362a 100644
--- a/src/hash.h
+++ b/src/hash.h
@@ -56,9 +56,9 @@ struct hash_table
 typedef int (*qsort_cmp_t) __P((void const *, void const *));
 
 void hash_init __P((struct hash_table *ht, unsigned long size,
-		    hash_func_t hash_1, hash_func_t hash_2, hash_cmp_func_t hash_cmp));
+                    hash_func_t hash_1, hash_func_t hash_2, hash_cmp_func_t hash_cmp));
 void hash_load __P((struct hash_table *ht, void *item_table,
-		    unsigned long cardinality, unsigned long size));
+                    unsigned long cardinality, unsigned long size));
 void **hash_find_slot __P((struct hash_table *ht, void const *key));
 void *hash_find_item __P((struct hash_table *ht, void const *key));
 void *hash_insert __P((struct hash_table *ht, const void *item));
@@ -154,7 +154,7 @@ extern void *hash_deleted_item;
 #define ISTRING_HASH_1(KEY, RESULT) do { \
   unsigned char const *_key_ = (unsigned char const *) (KEY) - 1; \
   while (*++_key_) \
-    (RESULT) += ((isupper (*_key_) ? tolower (*_key_) : *_key_) << (_key_[1] & 0xf)); \
+    (RESULT) += (tolower (*_key_) << (_key_[1] & 0xf)); \
 } while (0)
 #define return_ISTRING_HASH_1(KEY) do { \
   unsigned long _result_ = 0; \
@@ -165,7 +165,7 @@ extern void *hash_deleted_item;
 #define ISTRING_HASH_2(KEY, RESULT) do { \
   unsigned char const *_key_ = (unsigned char const *) (KEY) - 1; \
   while (*++_key_) \
-    (RESULT) += ((isupper (*_key_) ? tolower (*_key_) : *_key_) << (_key_[1] & 0x7)); \
+    (RESULT) += (tolower (*_key_) << (_key_[1] & 0x7)); \
 } while (0)
 #define return_ISTRING_HASH_2(KEY) do { \
   unsigned long _result_ = 0; \