diff --git a/src/GUI/WindowsFileDialog.cxx b/src/GUI/WindowsFileDialog.cxx
index 3b9799994..9f7c816d1 100755
--- a/src/GUI/WindowsFileDialog.cxx
+++ b/src/GUI/WindowsFileDialog.cxx
@@ -74,7 +74,7 @@ void WindowsFileDialog::exec()
     opf.nMaxFile = MAX_PATH;
 
     std::string extensions;
-    size_t extensionsLen;
+    size_t extensionsLen=0;
     if (!_filterPatterns.empty()) {
         for (const auto& ext : _filterPatterns) {
             if (!simgear::strutils::starts_with(ext, "*.")) {
diff --git a/src/Network/AV400WSim.cxx b/src/Network/AV400WSim.cxx
index cd475027e..b6e9d0973 100644
--- a/src/Network/AV400WSim.cxx
+++ b/src/Network/AV400WSim.cxx
@@ -263,7 +263,7 @@ FGAV400WSimB::FGAV400WSimB() :
 hz2(0.0),
 hz2count(0),
 hz2cycles(0),    
-flight_phase(0xFF),
+flight_phase(-1),
 req_hostid(true),
 req_sbas(false)
 {