Index: src/OFZIPArchive.m
==================================================================
--- src/OFZIPArchive.m
+++ src/OFZIPArchive.m
@@ -660,11 +660,11 @@
 						 encoding: encoding] copy];
 		if (extraFieldLength > 0)
 			extraField = [[[stream readDataWithCount:
 			    extraFieldLength] mutableCopy] autorelease];
 
-		of_zip_archive_entry_extra_field_find(extraField,
+		ZIP64Index = of_zip_archive_entry_extra_field_find(extraField,
 		    OF_ZIP_ARCHIVE_ENTRY_EXTRA_FIELD_ZIP64, &ZIP64Size);
 
 		if (ZIP64Index != OF_NOT_FOUND) {
 			const uint8_t *ZIP64 =
 			    [extraField itemAtIndex: ZIP64Index];