diff --git a/src/pages.c b/src/pages.c
index 0864482c..9e92799f 100644
--- a/src/pages.c
+++ b/src/pages.c
@@ -957,7 +957,7 @@ int Backup_in_place(int width,int height)
 
   // Perform all allocations first
   
-  new_layer=calloc(Main_backups->Pages->Nb_layers,1);
+  new_layer=calloc(Main_backups->Pages->Nb_layers,sizeof(byte *));
   if (!new_layer)
     return 0;