diff --git a/includes/gpio.c b/includes/gpio.c
index 51c2b82..6fed039 100644
--- a/includes/gpio.c
+++ b/includes/gpio.c
@@ -183,16 +183,17 @@
 int gpio_open_interrupt(GPIO* gpio, GIOFunc func, gpointer user_data)
 {
 	int rc = GPIO_OK;
-	char* buf;
+	char buf[255];
 	sprintf(buf, "%s/gpio%d/value", gpio->dev, gpio->num);
 	gpio->fd = open(buf, O_RDONLY | O_NONBLOCK );
+	gpio->irq_inited = false;
 	if (gpio->fd == -1)
 	{
 		rc = GPIO_OPEN_ERROR;
 	}
 	else
 	{
-		GIOChannel* channel = g_io_channel_unix_new( gpio->fd );
+		GIOChannel* channel = g_io_channel_unix_new( gpio->fd);
 		guint id = g_io_add_watch( channel, G_IO_PRI, func, user_data );
 	}
 	return rc;
diff --git a/includes/gpio.h b/includes/gpio.h
index d9279e4..6983e77 100644
--- a/includes/gpio.h
+++ b/includes/gpio.h
@@ -3,6 +3,7 @@
 
 #include <stdint.h>
 #include <gio/gio.h>
+#include <stdbool.h>
 
 typedef struct {
   gchar* name;
@@ -10,6 +11,7 @@
   uint16_t num;
   gchar* direction;
   int fd;
+  bool irq_inited;
 } GPIO;