diff --git a/CMakeLists.txt b/CMakeLists.txt
index ff3f81b9a..1aa47bcb1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -104,7 +104,7 @@ if (COMPILER_SUPPORTS_WDATE_TIME)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wdate-time")
 endif()
 
-if (NOT WIN32)
+if (NOT WIN32 AND NOT HAIKU)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fstack-protector-all")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wstack-protector")
 endif()
diff --git a/src/widget/qrwidget.cpp b/src/widget/qrwidget.cpp
index fd298692f..7656a2e54 100644
--- a/src/widget/qrwidget.cpp
+++ b/src/widget/qrwidget.cpp
@@ -25,7 +25,7 @@
 #include <QPainter>
 #include <qrencode.h>
 
-#ifdef Q_OS_WIN32
+#if defined(Q_OS_WIN32) || defined(Q_OS_HAIKU)
 #include <errno.h>
 #else
 #include <sys/errno.h>