diff --git a/boehm-gc/ChangeLog b/boehm-gc/ChangeLog
index 182fef1cab35022f291a42b3ac7140322654cd4f..8195dd2dbc30a1b05205975dd336d39afa80893f 100644
--- a/boehm-gc/ChangeLog
+++ b/boehm-gc/ChangeLog
@@ -1,3 +1,7 @@
+2004-04-25  Andreas Jaeger  <aj@suse.de>
+
+        * mark.c (GC_mark_from): Use pointer as prefetch argument.
+
 2004-04-06  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* include/private/gcconfig.h (PREFETCH): Use __builtin_prefetch
diff --git a/boehm-gc/mark.c b/boehm-gc/mark.c
index ca947290291b880de35b19d2ca2a632476fd4322..fffd62ac90cf692c3dbcb428b0cd23922b3a5465 100644
--- a/boehm-gc/mark.c
+++ b/boehm-gc/mark.c
@@ -684,7 +684,7 @@ mse * mark_stack_limit;
               current = *current_p;
 	      FIXUP_POINTER(current);
 	      if ((ptr_t)current >= least_ha && (ptr_t)current < greatest_ha) {
-		PREFETCH(current);
+		PREFETCH((ptr_t)current);
                 HC_PUSH_CONTENTS((ptr_t)current, mark_stack_top,
 			      mark_stack_limit, current_p, exit1);
 	      }
@@ -760,7 +760,7 @@ mse * mark_stack_limit;
 	  FIXUP_POINTER(deferred);
 	  limit = (word *)((char *)limit - ALIGNMENT);
 	  if ((ptr_t)deferred >= least_ha && (ptr_t)deferred <  greatest_ha) {
-	    PREFETCH(deferred);
+	    PREFETCH((ptr_t)deferred);
 	    break;
 	  }
 	  if (current_p > limit) goto next_object;
@@ -770,7 +770,7 @@ mse * mark_stack_limit;
 	  FIXUP_POINTER(deferred);
 	  limit = (word *)((char *)limit - ALIGNMENT);
 	  if ((ptr_t)deferred >= least_ha && (ptr_t)deferred <  greatest_ha) {
-	    PREFETCH(deferred);
+	    PREFETCH((ptr_t)deferred);
 	    break;
 	  }
 	  if (current_p > limit) goto next_object;
@@ -787,7 +787,7 @@ mse * mark_stack_limit;
         if ((ptr_t)current >= least_ha && (ptr_t)current <  greatest_ha) {
   	  /* Prefetch the contents of the object we just pushed.  It's	*/
   	  /* likely we will need them soon.				*/
-  	  PREFETCH(current);
+  	  PREFETCH((ptr_t)current);
           HC_PUSH_CONTENTS((ptr_t)current, mark_stack_top,
   		           mark_stack_limit, current_p, exit2);
         }