diff --git a/src/net/sourceforge/plantuml/style/CommandStyleImport.java b/src/net/sourceforge/plantuml/style/CommandStyleImport.java
index fe2f68f51..bdc6d5ab7 100644
--- a/src/net/sourceforge/plantuml/style/CommandStyleImport.java
+++ b/src/net/sourceforge/plantuml/style/CommandStyleImport.java
@@ -86,7 +86,9 @@ public class CommandStyleImport extends SingleLineCommand2<TitledDiagram> {
 			if (path.startsWith("http://") || path.startsWith("https://")) {
 				SURL url = SURL.create(path);
 				try (InputStream remoteInputStream = url.openStream()) {
-					lines = BlocLines.load(remoteInputStream, location);
+					if (remoteInputStream != null) {
+						lines = BlocLines.load(remoteInputStream, location);
+					}
 				}
 			} else {
 				final SFile styleFile = FileSystem.getInstance().getFile(path);