--- a/ZipArchive.st	Thu Jun 30 07:04:26 2016 +0200
+++ b/ZipArchive.st	Fri Jul 01 06:44:28 2016 +0200
@@ -3231,6 +3231,12 @@
     endOfArchive   := anEndPosition.
 !
 
+signatureInformation
+    "for compatibility with SignedZipArchive"
+    
+    ^ nil
+!
+
 size
     ^self fileSize
 !
@@ -3994,6 +4000,7 @@
     ^ false.
 ! !
 
+
 !ZipArchive methodsFor:'reading'!
 
 extract:fileName
@@ -4103,6 +4110,7 @@
     "Created: / 21-11-2010 / 11:51:41 / cg"
 ! !
 
+
 !ZipArchive methodsFor:'reading - stream'!
 
 extract:fileName intoStream: aWriteStream