diff --git a/src/main/java/org/warp/commonutils/type/ShortNamedThreadFactory.java b/src/main/java/org/warp/commonutils/type/ShortNamedThreadFactory.java
index 54e55c1..7261ad3 100644
--- a/src/main/java/org/warp/commonutils/type/ShortNamedThreadFactory.java
+++ b/src/main/java/org/warp/commonutils/type/ShortNamedThreadFactory.java
@@ -49,9 +49,7 @@ public class ShortNamedThreadFactory implements ThreadFactory {
 	 * @param threadNamePrefix the name prefix assigned to each thread created.
 	 */
 	public ShortNamedThreadFactory(String threadNamePrefix) {
-		final SecurityManager s = System.getSecurityManager();
-		group = (s != null) ? s.getThreadGroup() : Thread.currentThread()
-				.getThreadGroup();
+		group = Thread.currentThread().getThreadGroup();
 		this.threadNamePrefix = String.format(Locale.ROOT, NAME_PATTERN,
 				checkPrefix(threadNamePrefix), threadPoolNumber[(threadNamePrefix.hashCode() % POOL_NUMBERS_COUNT / 2) + POOL_NUMBERS_COUNT / 2].getAndIncrement());
 	}