diff --git a/magick/distribute-cache.c b/magick/distribute-cache.c
index da134b4281..4b064295a3 100755
--- a/magick/distribute-cache.c
+++ b/magick/distribute-cache.c
@@ -427,13 +427,13 @@ MagickPrivate DistributeCacheInfo *DestroyDistributeCacheInfo(
 static MagickBooleanType DestroyDistributeCache(SplayTreeInfo *registry,
   const size_t session_key)
 {
-  const size_t
-    *key = (const size_t *) NULL;
+  MagickAddressType
+    key = (MagickAddressType) session_key;
 
   /*
     Destroy distributed pixel cache.
   */
-  return(DeleteNodeFromSplayTree(registry,key+session_key));
+  return(DeleteNodeFromSplayTree(registry,(const void *) key));
 }
 
 static inline MagickOffsetType dpc_send(int file,const MagickSizeType length,
@@ -471,12 +471,12 @@ static inline MagickOffsetType dpc_send(int file,const MagickSizeType length,
 static MagickBooleanType OpenDistributeCache(SplayTreeInfo *registry,int file,
   const size_t session_key,ExceptionInfo *exception)
 {
-  const size_t
-    *key = (const size_t *) NULL;
-
   Image
     *image;
 
+  MagickAddressType
+    key = (MagickAddressType) session_key;
+
   MagickBooleanType
     status;
 
@@ -517,7 +517,7 @@ static MagickBooleanType OpenDistributeCache(SplayTreeInfo *registry,int file,
   p+=sizeof(image->rows);
   if (SyncImagePixelCache(image,exception) == MagickFalse)
     return(MagickFalse);
-  status=AddValueToSplayTree(registry,key+session_key,image);
+  status=AddValueToSplayTree(registry,(const void *) key,image);
   return(status);
 }
 
@@ -530,12 +530,12 @@ static MagickBooleanType ReadDistributeCacheIndexes(SplayTreeInfo *registry,
   const PixelPacket
     *p;
 
-  const size_t
-    *key = (const size_t *) NULL;
-
   Image
     *image;
 
+  MagickAddressType
+    key = (MagickAddressType) session_key;
+
   MagickOffsetType
     count;
 
@@ -552,7 +552,7 @@ static MagickBooleanType ReadDistributeCacheIndexes(SplayTreeInfo *registry,
   /*
     Read distributed pixel cache indexes.
   */
-  image=(Image *) GetValueFromSplayTree(registry,key+session_key);
+  image=(Image *) GetValueFromSplayTree(registry,(const void *) key);
   if (image == (Image *) NULL)
     return(MagickFalse);
   length=sizeof(region.width)+sizeof(region.height)+sizeof(region.x)+
@@ -588,12 +588,12 @@ static MagickBooleanType ReadDistributeCachePixels(SplayTreeInfo *registry,
   const PixelPacket
     *p;
 
-  const size_t
-    *key = (const size_t *) NULL;
-
   Image
     *image;
 
+  MagickAddressType
+    key = (MagickAddressType) session_key;
+
   MagickOffsetType
     count;
 
@@ -610,7 +610,7 @@ static MagickBooleanType ReadDistributeCachePixels(SplayTreeInfo *registry,
   /*
     Read distributed pixel cache pixels.
   */
-  image=(Image *) GetValueFromSplayTree(registry,key+session_key);
+  image=(Image *) GetValueFromSplayTree(registry,(const void *) key);
   if (image == (Image *) NULL)
     return(MagickFalse);
   length=sizeof(region.width)+sizeof(region.height)+sizeof(region.x)+
@@ -647,15 +647,15 @@ static void *RelinquishImageRegistry(void *image)
 static MagickBooleanType WriteDistributeCacheIndexes(SplayTreeInfo *registry,
   int file,const size_t session_key,ExceptionInfo *exception)
 {
-  const size_t
-    *key = (const size_t *) NULL;
-
   Image
     *image;
 
   IndexPacket
     *indexes;
 
+  MagickAddressType
+    key = (MagickAddressType) session_key;
+
   MagickOffsetType
     count;
 
@@ -674,7 +674,7 @@ static MagickBooleanType WriteDistributeCacheIndexes(SplayTreeInfo *registry,
   /*
     Write distributed pixel cache indexes.
   */
-  image=(Image *) GetValueFromSplayTree(registry,key+session_key);
+  image=(Image *) GetValueFromSplayTree(registry,(const void *) key);
   if (image == (Image *) NULL)
     return(MagickFalse);
   length=sizeof(region.width)+sizeof(region.height)+sizeof(region.x)+
@@ -707,12 +707,12 @@ static MagickBooleanType WriteDistributeCacheIndexes(SplayTreeInfo *registry,
 static MagickBooleanType WriteDistributeCachePixels(SplayTreeInfo *registry,
   int file,const size_t session_key,ExceptionInfo *exception)
 {
-  const size_t
-    *key = (const size_t *) NULL;
-
   Image
     *image;
 
+  MagickAddressType
+    key = (MagickAddressType) session_key;
+
   MagickOffsetType
     count;
 
@@ -732,7 +732,7 @@ static MagickBooleanType WriteDistributeCachePixels(SplayTreeInfo *registry,
   /*
     Write distributed pixel cache pixels.
   */
-  image=(Image *) GetValueFromSplayTree(registry,key+session_key);
+  image=(Image *) GetValueFromSplayTree(registry,(const void *) key);
   if (image == (Image *) NULL)
     return(MagickFalse);
   length=sizeof(region.width)+sizeof(region.height)+sizeof(region.x)+
diff --git a/wand/wand.c b/wand/wand.c
index a9d50001cb..16bbc365a9 100644
--- a/wand/wand.c
+++ b/wand/wand.c
@@ -76,14 +76,11 @@ static SemaphoreInfo
 */
 WandExport size_t AcquireWandId(void)
 {
-  const size_t
-    *wand_id = (const size_t *) NULL;
-
-  size_t
-    id;
+  MagickAddressType
+    wand_id;
 
   static size_t
-    isn = 0;
+    id = 0;
 
   if (wand_semaphore == (SemaphoreInfo *) NULL)
     ActivateSemaphoreInfo(&wand_semaphore);
@@ -91,11 +88,12 @@ WandExport size_t AcquireWandId(void)
   if (wand_ids == (SplayTreeInfo *) NULL)
     wand_ids=NewSplayTree((int (*)(const void *,const void *)) NULL,
       (void *(*)(void *)) NULL,(void *(*)(void *)) NULL);
-  id=isn++;
-  (void) AddValueToSplayTree(wand_ids,wand_id+id,wand_id+id);
+  wand_id=id++;
+  (void) AddValueToSplayTree(wand_ids,(const void *) wand_id,(const void *)
+    wand_id);
   instantiate_wand=MagickTrue;
   UnlockSemaphoreInfo(wand_semaphore);
-  return(id);
+  return((size_t) wand_id);
 }
 
 /*
@@ -154,11 +152,11 @@ WandExport void DestroyWandIds(void)
 */
 WandExport void RelinquishWandId(const size_t id)
 {
-  const size_t
-    *wand_id = (const size_t *) NULL;
+  MagickAddressType
+    wand_id = (MagickAddressType) id;
 
   LockSemaphoreInfo(wand_semaphore);
   if (wand_ids != (SplayTreeInfo *) NULL)
-    (void) DeleteNodeFromSplayTree(wand_ids,wand_id+id);
+    (void) DeleteNodeFromSplayTree(wand_ids,(const void *) wand_id);
   UnlockSemaphoreInfo(wand_semaphore);
 }