diff --git a/camel-core/src/main/java/org/apache/camel/util/FileUtil.java b/camel-core/src/main/java/org/apache/camel/util/FileUtil.java
index b624a210d84db..9668cc722f126 100644
--- a/camel-core/src/main/java/org/apache/camel/util/FileUtil.java
+++ b/camel-core/src/main/java/org/apache/camel/util/FileUtil.java
@@ -45,6 +45,7 @@ public final class FileUtil {
     private static final File USER_DIR = new File(System.getProperty(USER_DIR_KEY));
     private static File defaultTempDir;
     private static Thread shutdownHook;
+    private static boolean windowsOs = initWindowsOs();
 
     private FileUtil() {
         // Utils method
@@ -70,12 +71,19 @@ public static String normalizePath(String path) {
             return path.replace('\\', '/');
         }
     }
-    
-    public static boolean isWindows() {
+
+    private static boolean initWindowsOs() {
         String osName = System.getProperty("os.name").toLowerCase(Locale.US);
         return osName.indexOf("windows") > -1;
     }
 
+    /**
+     * Returns true, if the OS is windows
+     */
+    public static boolean isWindows() {
+        return windowsOs;
+    }
+
     @Deprecated
     public static File createTempFile(String prefix, String suffix) throws IOException {
         return createTempFile(prefix, suffix, null);