diff --git a/src/toxic.c b/src/toxic.c
index d175e7a..ea155df 100644
--- a/src/toxic.c
+++ b/src/toxic.c
@@ -92,7 +92,7 @@ static struct _user_password {
 
 static void catch_SIGINT(int sig)
 {
-    Winthread.sig_exit_toxic = true;
+    Winthread.sig_exit_toxic = 1;
 }
 
 static void catch_SIGSEGV(int sig)
@@ -105,7 +105,7 @@ static void catch_SIGSEGV(int sig)
 
 static void flag_window_resize(int sig)
 {
-    Winthread.flag_resize = true;
+    Winthread.flag_resize = 1;
 }
 
 static void init_signal_catchers(void)
@@ -727,7 +727,7 @@ void *thread_winref(void *data)
 
         if (Winthread.flag_resize) {
             on_window_resize();
-            Winthread.flag_resize = false;
+            Winthread.flag_resize = 0;
         } else if (draw_count >= INACTIVE_WIN_REFRESH_RATE) {
             refresh_inactive_windows();
             draw_count = 0;
diff --git a/src/windows.h b/src/windows.h
index f9cf0ac..1b53a01 100644
--- a/src/windows.h
+++ b/src/windows.h
@@ -26,6 +26,7 @@
 #include <pthread.h>
 #include <wctype.h>
 #include <wchar.h>
+#include <signal.h>
 
 #include <tox/tox.h>
 
@@ -67,8 +68,8 @@ typedef enum {
 struct _Winthread {
     pthread_t tid;
     pthread_mutex_t lock;
-    bool sig_exit_toxic;
-    bool flag_resize;
+    volatile sig_atomic_t sig_exit_toxic;
+    volatile sig_atomic_t flag_resize;
 };
 
 struct _cqueue_thread {