diff --git a/src/blackmisc/atomicfile.cpp b/src/blackmisc/atomicfile.cpp
index 5683a3cbd..4dd266ed1 100644
--- a/src/blackmisc/atomicfile.cpp
+++ b/src/blackmisc/atomicfile.cpp
@@ -22,7 +22,7 @@
 #include <stdio.h>
 #include <errno.h>
 #elif defined(Q_OS_WIN32)
-#include <windows.h>
+#include <Windows.h>
 #include <io.h>
 #endif
 
diff --git a/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp b/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp
index b98473a29..3f9535523 100644
--- a/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp
+++ b/src/blackmisc/simulation/xplane/aircraftmodelloaderxplane.cpp
@@ -308,7 +308,7 @@ namespace BlackMisc
             {
                 for (auto i = m_cslPackages.cbegin(); i != m_cslPackages.cend(); ++i)
                 {
-                    if (strncmp(qPrintable(i->name), qPrintable(ioPath), i->name.size()) == 0)
+                    if (strncmp(qPrintable(i->name), qPrintable(ioPath), static_cast<size_t>(i->name.size())) == 0)
                     {
                         ioPath.remove(0, i->name.size());
                         ioPath.insert(0, i->path);