diff -Nru qtserialbus-everywhere-src-5.11.2/debian/changelog qtserialbus-everywhere-src-5.11.2/debian/changelog
--- qtserialbus-everywhere-src-5.11.2/debian/changelog	2018-11-09 17:29:18.000000000 +0000
+++ qtserialbus-everywhere-src-5.11.2/debian/changelog	2018-11-10 10:20:57.000000000 +0000
@@ -1,3 +1,9 @@
+qtserialbus-everywhere-src (5.11.2-2) unstable; urgency=medium
+
+  * Add a patch to fix pduFromStream() on big endian (big_endian.diff).
+
+ -- Dmitry Shachnev <mitya57@debian.org>  Sat, 10 Nov 2018 13:20:57 +0300
+
 qtserialbus-everywhere-src (5.11.2-1) unstable; urgency=medium
 
   [ Scarlett Moore ]
diff -Nru qtserialbus-everywhere-src-5.11.2/debian/patches/big_endian.diff qtserialbus-everywhere-src-5.11.2/debian/patches/big_endian.diff
--- qtserialbus-everywhere-src-5.11.2/debian/patches/big_endian.diff	1970-01-01 00:00:00.000000000 +0000
+++ qtserialbus-everywhere-src-5.11.2/debian/patches/big_endian.diff	2018-11-10 10:20:57.000000000 +0000
@@ -0,0 +1,20 @@
+Description: make pduFromStream work on big endian
+Author: Dmitry Shachnev <mitya57@debian.org>
+Forwarded: https://codereview.qt-project.org/245206
+Last-Update: 2018-11-10
+
+--- a/src/serialbus/qmodbuspdu.cpp
++++ b/src/serialbus/qmodbuspdu.cpp
+@@ -105,9 +105,10 @@
+ 
+ static QDataStream &pduFromStream(QDataStream &stream, QModbusPdu &pdu, Type type)
+ {
+-    QModbusPdu::FunctionCode code = QModbusPdu::Invalid;
+-    if (stream.readRawData((char *) (&code), sizeof(quint8)) != sizeof(quint8))
++    quint8 codeByte = 0;
++    if (stream.readRawData((char *) (&codeByte), sizeof(quint8)) != sizeof(quint8))
+         return stream;
++    QModbusPdu::FunctionCode code = (QModbusPdu::FunctionCode) codeByte;
+     pdu.setFunctionCode(code);
+ 
+     auto needsAdditionalRead = [](QModbusPdu &pdu, int size) -> bool {
diff -Nru qtserialbus-everywhere-src-5.11.2/debian/patches/series qtserialbus-everywhere-src-5.11.2/debian/patches/series
--- qtserialbus-everywhere-src-5.11.2/debian/patches/series	1970-01-01 00:00:00.000000000 +0000
+++ qtserialbus-everywhere-src-5.11.2/debian/patches/series	2018-11-10 10:20:57.000000000 +0000
@@ -0,0 +1 @@
+big_endian.diff