diff --git a/Sources/Gzip/Data+Gzip.swift b/Sources/Gzip/Data+Gzip.swift
index 1f9c6c5..53b935c 100644
--- a/Sources/Gzip/Data+Gzip.swift
+++ b/Sources/Gzip/Data+Gzip.swift
@@ -211,7 +211,7 @@ extension Data {
                 stream.next_in = nil
             }
             
-        } while stream.avail_out == 0
+        } while stream.avail_out == 0 && status != Z_STREAM_END
         
         guard deflateEnd(&stream) == Z_OK, status == Z_STREAM_END else {
             throw GzipError(code: status, msg: stream.msg)