diff --git a/src/os_win32.c b/src/os_win32.c
index f325935..6af5046 100644
--- a/src/os_win32.c
+++ b/src/os_win32.c
@@ -8334,9 +8334,9 @@
  * deleted. Ping-ponging between the two flags prevents this causing 'fake'
  * timeouts.
  */
-static int      timeout_flags[2];
-static int      timeout_flag_idx = 0;
-static int      *timeout_flag = &timeout_flags[0];
+static sig_atomic_t timeout_flags[2];
+static int	    timeout_flag_idx = 0;
+static sig_atomic_t *timeout_flag = &timeout_flags[0];
 
 
     static void CALLBACK
@@ -8378,7 +8378,7 @@
  * This function is not expected to fail, but if it does it still returns a
  * valid flag pointer; the flag will remain stuck at zero.
  */
-    volatile int *
+    volatile sig_atomic_t *
 start_timeout(long msec)
 {
     BOOL ret;