diff --git a/libobjc/ChangeLog b/libobjc/ChangeLog
index e2d93108abf87ecf8f1675c28c83c71831bc3493..e66df6a9836330acff3e6f7e31c1d40923b0ab5f 100644
--- a/libobjc/ChangeLog
+++ b/libobjc/ChangeLog
@@ -1,3 +1,15 @@
+2010-10-12  Nicola Pero  <nicola.pero@meta-innovation.com>
+
+	* selector.c (sel_getName): Return "<null selector>" for a NULL
+	argument.
+	(sel_get_name): Return 0 for a NULL argument.
+	* objc/runtime.h (sel_getName): Updated documentation.
+
+	* objc-private/hash.h (class_hash_table): Unused declaration
+	removed.
+	(module_hash_table): Same.
+	* objc/deprecated/hash.h: Same changes.
+	
 2010-10-11  Nicola Pero  <nicola.pero@meta-innovation.com>
 
 	* class.c (objc_getClassList): New.
diff --git a/libobjc/objc-private/hash.h b/libobjc/objc-private/hash.h
index 7c57a4d2589726fccf11f01f833b4fdcdd98830d..ba4c494343816cccd48beffc0cd30e3380cf75a0 100644
--- a/libobjc/objc-private/hash.h
+++ b/libobjc/objc-private/hash.h
@@ -104,9 +104,6 @@ typedef struct cache
 } *cache_ptr;
 
 
-/* Two important hash tables.  */
-extern cache_ptr module_hash_table, class_hash_table;
-
 /* Allocate and initialize a hash table.  */ 
 
 cache_ptr objc_hash_new (unsigned int size,
diff --git a/libobjc/objc/deprecated/hash.h b/libobjc/objc/deprecated/hash.h
index 52ee8c313457fb63714265fb3f1ddb14f02461d8..8b718a4417d295b9e2b76565adbd87c7d3574fc5 100644
--- a/libobjc/objc/deprecated/hash.h
+++ b/libobjc/objc/deprecated/hash.h
@@ -104,9 +104,6 @@ typedef struct cache
 } *cache_ptr;
 
 
-/* Two important hash tables.  */
-extern cache_ptr module_hash_table, class_hash_table;
-
 /* Allocate and initialize a hash table.  */ 
 
 cache_ptr objc_hash_new (unsigned int size,
diff --git a/libobjc/objc/runtime.h b/libobjc/objc/runtime.h
index b15c522235d422613c396684f32b90a0adbb972c..f3a19ec0b237c288e3e8798dc5ced8603bd8e351 100644
--- a/libobjc/objc/runtime.h
+++ b/libobjc/objc/runtime.h
@@ -168,7 +168,8 @@ object_getClass (id object)
 
 /** Implementation: the following functions are in selector.c.  */
 
-/* Return the name of a given selector.  */
+/* Return the name of a given selector.  If 'selector' is NULL, return
+   "<null selector>".  */
 objc_EXPORT const char *sel_getName (SEL selector);
 
 /* Return the type of a given selector.
diff --git a/libobjc/selector.c b/libobjc/selector.c
index 93952fd383446522f8f99ffe7184de9913916988..e51dd20bd9b46daca485f0b12e26a52fbb405318 100644
--- a/libobjc/selector.c
+++ b/libobjc/selector.c
@@ -293,6 +293,9 @@ const char *sel_getName (SEL selector)
 {
   const char *ret;
 
+  if (selector == NULL)
+    return "<null selector>";
+
   objc_mutex_lock (__objc_runtime_mutex);
   if ((soffset_decode ((sidx)selector->sel_id) > 0)
       && (soffset_decode ((sidx)selector->sel_id) <= __objc_selector_max_index))
@@ -306,6 +309,9 @@ const char *sel_getName (SEL selector)
 /* Traditional GNU Objective-C Runtime API.  */
 const char *sel_get_name (SEL selector)
 {
+  if (selector == NULL)
+    return 0;
+
   return sel_getName (selector);
 }