diff --git a/src/net/sourceforge/plantuml/AFileZipEntry.java b/src/net/sourceforge/plantuml/AFileZipEntry.java
index e0bb5a4c2..ee29ccf82 100644
--- a/src/net/sourceforge/plantuml/AFileZipEntry.java
+++ b/src/net/sourceforge/plantuml/AFileZipEntry.java
@@ -60,7 +60,8 @@ public class AFileZipEntry implements AFile {
 	public InputStream openFile() {
 		final InputStream tmp = zipFile.openFile();
 		if (tmp != null)
-			try (final ZipInputStream zis = new ZipInputStream(tmp)) {
+			try {
+				final ZipInputStream zis = new ZipInputStream(tmp);
 				ZipEntry ze = zis.getNextEntry();
 
 				while (ze != null) {
@@ -72,6 +73,7 @@ public class AFileZipEntry implements AFile {
 					ze = zis.getNextEntry();
 				}
 				zis.closeEntry();
+				zis.close();
 			} catch (IOException e) {
 				e.printStackTrace();
 			}