diff --git a/native/jsdos/jsdos-support.cpp b/native/jsdos/jsdos-support.cpp
index 9cabac26..71d1df25 100644
--- a/native/jsdos/jsdos-support.cpp
+++ b/native/jsdos/jsdos-support.cpp
@@ -10,22 +10,22 @@
 
 namespace {
 #ifndef EMSCRIPTEN
-    std::atomic_bool _exit(false);
+    std::atomic_bool jsdos_exit(false);
 #else
-    bool _exit = false;
+    bool jsdos_exit = false;
 #endif
 }
 
 void jsdos::init() {
-    _exit = false;
+    jsdos_exit = false;
 }
 
 bool jsdos::isExitRequested() {
-    return _exit;
+    return jsdos_exit;
 }
 
 void jsdos::requestExit() {
-    _exit = true;
+    jsdos_exit = true;
 }
 
 void jsdos::cout(const char* data, int amount) {
diff --git a/targets/dosbox.cmake b/targets/dosbox.cmake
index 34fd6f0f..8794a5f8 100644
--- a/targets/dosbox.cmake
+++ b/targets/dosbox.cmake
@@ -172,7 +172,7 @@ target_include_directories(libdosbox-core PUBLIC ${INCLUDE_DIRECTORIES_CORE})
 add_library(libdosbox OBJECT ${SOURCES_JSDOS_CXX11} ${SOURCES_JSDOS_NET_C})
 target_link_libraries(libdosbox libdosbox-core)
 
-if (MINGW)
+if (MINGW AND TARGET dosbox)
     target_compile_definitions(dosbox PUBLIC -DWIN32)
 endif ()