diff --git a/src/p_unix.cpp b/src/p_unix.cpp
index 16f36988..8af0530c 100644
--- a/src/p_unix.cpp
+++ b/src/p_unix.cpp
@@ -658,7 +658,11 @@ void PackUnix::unpack(OutputFile *fo)
         fi->readx(&bhdr, szb_info);
         ph.u_len = sz_unc = get_te32(&bhdr.sz_unc);
         ph.c_len = sz_cpr = get_te32(&bhdr.sz_cpr);
-        ph.set_method(bhdr.b_method);
+        if (szb_info < sizeof(b_info)) { // some upx version 11
+            bhdr.b_method = ph.method;
+            bhdr.b_ftid = ph.filter;
+            bhdr.b_cto8 = ph.filter_cto;
+        }
 
         if (sz_unc == 0)                   // uncompressed size 0 -> EOF
         {