diff --git a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/Span.java b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/Span.java
index d05898791..cb07d86a3 100644
--- a/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/Span.java
+++ b/spring-cloud-sleuth-core/src/main/java/org/springframework/cloud/sleuth/Span.java
@@ -135,7 +135,7 @@ public class Span {
 
 	@SuppressWarnings("unused")
 	private Span() {
-		this(-1,-1,"dummy",0,Collections.emptyList(),0,false,false,null);
+		this(-1,-1,"dummy",0,Collections.<Long>emptyList(),0,false,false,null);
 	}
 
 	/**