diff --git a/ui/scripts/instances.js b/ui/scripts/instances.js
index 6870f5b45c6..4d536e33929 100644
--- a/ui/scripts/instances.js
+++ b/ui/scripts/instances.js
@@ -1709,7 +1709,7 @@
                             				break;
                             			}
                             		}                            		
-                            		if (ostypeName == undefined || ostypeName.indexOf("win") == -1) {                            			
+                            		if (ostypeName == undefined || ostypeName.indexOf("Win") == -1) {                            			
                             			hiddenFields.push('xenserverToolsVersion61plus');
                             		}                            		
                             	}
diff --git a/ui/scripts/templates.js b/ui/scripts/templates.js
index cef6a2a2c9e..dbc60b082ab 100644
--- a/ui/scripts/templates.js
+++ b/ui/scripts/templates.js
@@ -868,7 +868,7 @@
                                     				break;
                                     			}
                                     		}                            		
-                                    		if (ostypeName == undefined || ostypeName.indexOf("win") == -1) {                            			
+                                    		if (ostypeName == undefined || ostypeName.indexOf("Win") == -1) {                            			
                                     			hiddenFields.push('xenserverToolsVersion61plus');
                                     		}                            		
                                     	}
@@ -1241,7 +1241,7 @@
                                                 				break;
                                                 			}
                                                 		}                            		
-                                                		if (ostypeName == undefined || ostypeName.indexOf("win") == -1) {                            			
+                                                		if (ostypeName == undefined || ostypeName.indexOf("Win") == -1) {                            			
                                                 			hiddenFields.push('xenserverToolsVersion61plus');
                                                 		}                            		
                                                 	}