diff --git a/evtone.c b/evtone.c
index 51fc7c6..8f0a8bc 100644
--- a/evtone.c
+++ b/evtone.c
@@ -145,7 +145,7 @@
 int wait_ms(int dry_run, int duration_ms);
 int stop_tone(int dry_run, int device);
 
-volatile int got_signal = 0;
+volatile sig_atomic_t got_signal = 0;
 
 void handle_signal(int signal) { got_signal = signal; }