diff --git a/demo/pwm.c b/demo/pwm.c
index ede2ec7..e3fbf69 100644
--- a/demo/pwm.c
+++ b/demo/pwm.c
@@ -64,7 +64,7 @@ int main(int argc, char *argv[])
 
 	if(options.n_scan==2) {
 		printf("%d\n",comedi_get_maxdata(device,options.subdevice,0));
-		close(device);
+		comedi_close(device);
 		exit(0);
 	}