diff --git a/ext/phar/phar.c b/ext/phar/phar.c
index 866eb41b188..c45efbf4417 100644
--- a/ext/phar/phar.c
+++ b/ext/phar/phar.c
@@ -3101,9 +3101,7 @@ int phar_flush(phar_archive_data *phar, char *user_stub, long len, int convert,
 		/* this will have changed for all files that have either changed compression or been modified */
 		entry->offset = entry->offset_abs = offset;
 		offset += entry->compressed_filesize;
-		phar_stream_copy_to_stream(file, newfile, entry->compressed_filesize, &wrote);
-
-		if (entry->compressed_filesize != wrote) {
+		if (phar_stream_copy_to_stream(file, newfile, entry->compressed_filesize, &wrote) == FAILURE) {
 			if (closeoldfile) {
 				php_stream_close(oldfile);
 			}