diff --git a/ChangeLog b/ChangeLog
index 44ae7d33c..a83f54706 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -5,6 +5,7 @@
 	* configure.ac: Check for new GC_allow_register_threads() function.
 	* Source/NSThread.m: Attempt to fix thread registration for GC.
 	* Source/NSObject.m: Initialise finalize on mingw as well as unix.
+	* Source/NSZone.m: Remove unnecessary casts.
 
 2009-02-09  Matt Rice  <ratmice@gmail.com>
 
diff --git a/Source/NSThread.m b/Source/NSThread.m
index 59a7ca508..b533976fd 100644
--- a/Source/NSThread.m
+++ b/Source/NSThread.m
@@ -756,7 +756,7 @@ gnustep_base_thread_callback(void)
       {
 	int	result;
 
-	result = GC_register_my_thread(base);
+	result = GC_register_my_thread(&base);
 	if (result != GC_SUCCESS && result != GC_DUPLICATE)
 	  {
 	    fprintf(stderr, "Argh ... no thread support in garbage collection library\n");
diff --git a/Source/NSZone.m b/Source/NSZone.m
index 53971a8c1..a969ddfa9 100644
--- a/Source/NSZone.m
+++ b/Source/NSZone.m
@@ -1918,10 +1918,10 @@ GSAssignZeroingWeakPointer(void **destination, void *source)
     }
   if (*destination != 0)
     {
-      GC_unregister_disappearing_link((GC_PTR*)destination);
+      GC_unregister_disappearing_link(destination);
     }
   *destination = source;
-  GC_general_register_disappearing_link((GC_PTR*)destination, source);
+  GC_general_register_disappearing_link(destination, source);
   return YES;
 }