diff --git a/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/net/protocol/jar/JarUrlConnection.java b/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/net/protocol/jar/JarUrlConnection.java
index c39bd37a44fd..b95965447e62 100644
--- a/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/net/protocol/jar/JarUrlConnection.java
+++ b/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/net/protocol/jar/JarUrlConnection.java
@@ -172,7 +172,7 @@ public Object getContent() throws IOException {
 
 	@Override
 	public Permission getPermission() throws IOException {
-		return this.jarFileConnection.getPermission();
+		return (this.jarFileConnection != null) ? this.jarFileConnection.getPermission() : null;
 	}
 
 	@Override