diff --git a/oauth2/oauth2-resource-server/src/main/java/org/springframework/security/oauth2/server/resource/authentication/BearerTokenAuthenticationToken.java b/oauth2/oauth2-resource-server/src/main/java/org/springframework/security/oauth2/server/resource/authentication/BearerTokenAuthenticationToken.java
index 9ba55a25554..839f93cace1 100644
--- a/oauth2/oauth2-resource-server/src/main/java/org/springframework/security/oauth2/server/resource/authentication/BearerTokenAuthenticationToken.java
+++ b/oauth2/oauth2-resource-server/src/main/java/org/springframework/security/oauth2/server/resource/authentication/BearerTokenAuthenticationToken.java
@@ -47,7 +47,7 @@ public class BearerTokenAuthenticationToken extends AbstractAuthenticationToken
 	 */
 	public BearerTokenAuthenticationToken(String token) {
 		super(Collections.emptyList());
-		Assert.hasText(token, "token cannot be empty");
+		Assert.notNull(token, "token cannot be null");
 		this.token = token;
 	}