diff --git a/src/ace/Editor.js b/src/ace/Editor.js
index 40ee1bcb..671ff918 100644
--- a/src/ace/Editor.js
+++ b/src/ace/Editor.js
@@ -547,6 +547,28 @@ ace.Editor = function(renderer, doc) {
         return firstRow - (lastRow - firstRow) + 1;
     };
 
+    this.selectPageDown = function() {
+        var row = this.getPageDownRow() + Math.floor(this.getVisibleRowCount() / 2);
+
+        this.scrollPageDown();
+
+        var selection = this.getSelection();
+        selection.$moveSelection(function() {
+            selection.moveCursorTo(row, selection.getSelectionLead().column);
+        });
+    };
+
+    this.selectPageUp = function() {
+        var visibleRows = this.getLastVisibleRow() - this.getFirstVisibleRow();
+        var row = this.getPageUpRow() + Math.round(visibleRows / 2);
+
+        this.scrollPageUp();
+
+        var selection = this.getSelection();
+        selection.$moveSelection(function() {
+            selection.moveCursorTo(row, selection.getSelectionLead().column);
+        });
+    };
 
     this.scrollPageDown = function() {
         this.scrollToRow(this.getPageDownRow());
diff --git a/src/ace/Selection.js b/src/ace/Selection.js
index f1048851..e209748f 100644
--- a/src/ace/Selection.js
+++ b/src/ace/Selection.js
@@ -157,27 +157,6 @@ ace.Selection = function(doc) {
         this.$moveSelection(this.moveCursorLineEnd);
     };
 
-    this.selectPageDown = function() {
-        var row = this.getPageDownRow() + Math.floor(this.getVisibleRowCount() / 2);
-
-        this.scrollPageDown();
-
-        this.$moveSelection(function() {
-            this.moveCursorTo(row, this.selectionLead.column);
-        });
-    };
-
-    this.selectPageUp = function() {
-        var visibleRows = this.getLastVisibleRow() - this.getFirstVisibleRow();
-        var row = this.getPageUpRow() + Math.round(visibleRows / 2);
-
-        this.scrollPageUp();
-
-        this.$moveSelection(function() {
-            this.moveCursorTo(row, this.selectionLead.column);
-        });
-    };
-
     this.selectFileEnd = function() {
         this.$moveSelection(this.moveCursorFileEnd);
     };