diff --git a/ChangeLog b/ChangeLog
index 6695c10cb..c56003fc6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+1999-04-28  Adam Fedor  <fedor@gnu.org>
+
+	* Source/include/FastArray.x (FastArrayInsertionPosition):
+	'Dereference' union object value (on PPC's at least, the union
+	address may not be the same as the address of the first type in
+	the union).
+	(FastArrayCheckSort): Likewise.
+
 1999-04-27  Adam Fedor  <fedor@gnu.org>
 
 	* configure.in: Check for sys/mount.h for NSFileManager functions
diff --git a/Headers/gnustep/base/FastArray.x b/Headers/gnustep/base/FastArray.x
index f86819d06..39373bcec 100644
--- a/Headers/gnustep/base/FastArray.x
+++ b/Headers/gnustep/base/FastArray.x
@@ -224,7 +224,7 @@ FastArrayInsertionPosition(FastArray array, FastArrayItem item, int (*sorter)())
    */
   for (index = upper/2; upper != lower; index = lower+(upper-lower)/2)
     {
-      int	comparison = (*sorter)(item, array->ptr[index]);
+      int	comparison = (*sorter)(item.obj, (array->ptr[index]).obj);
 
       if (comparison < 0)
 	{
@@ -243,7 +243,7 @@ FastArrayInsertionPosition(FastArray array, FastArrayItem item, int (*sorter)())
    *	Now skip past any equal items so the insertion point is AFTER any
    *	items that are equal to the new one.
    */
-  while (index < array->count && (*sorter)(item, array->ptr[index]) >= 0)
+  while (index < array->count && (*sorter)(item.obj, (array->ptr[index]).obj) >= 0)
     {
       index++;
     }
@@ -259,7 +259,7 @@ FastArrayCheckSort(FastArray array, int (*sorter)())
 
   for (i = 1; i < array->count; i++)
     {
-      NSCAssert(((*sorter)(array->ptr[i-1], array->ptr[i]) <= 0),
+      NSCAssert(((*sorter)((array->ptr[i-1]).obj, (array->ptr[i]).obj) <= 0),
 	NSInvalidArgumentException);
     }
 }