diff --git a/common/wdt.h b/common/wdt.h
new file mode 100644
index 0000000..2f6843e
--- /dev/null
+++ b/common/wdt.h
@@ -0,0 +1,35 @@
+/*
+ * This file is part of arduino-headers.
+ *
+ * arduino-headers is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or(at your option) any later version.
+ *
+ * arduino-headers is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with arduino-headers.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _ARDUINO_WDT_H
+#define _ARDUINO_WDT_H
+
+#include <avr/wdt.h>
+#include <avr/interrupt.h>
+
+#if defined(WDTCSR)
+#  define _WDT_REG  WDTCSR
+#else
+#  define _WDT_REG  WDTCR
+#endif
+
+static inline void wdt_interrupt_enable()  { _WDT_REG |= _BV(WDIE); }
+static inline void wdt_interrupt_disable() { _WDT_REG &= ~_BV(WDIE); }
+
+#define wdt_interrupt() ISR(WDT_vect)
+
+#endif
diff --git a/wdt.h b/wdt.h
new file mode 100644
index 0000000..8704f6f
--- /dev/null
+++ b/wdt.h
@@ -0,0 +1,31 @@
+/*
+ * This file is part of arduino-headers.
+ *
+ * arduino-headers is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or(at your option) any later version.
+ *
+ * arduino-headers is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with arduino-headers.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#if defined(__AVR_ATmega8__)
+#  error "arduino/wdt.h: Not implemented for ATmega8 chips yet"
+#elif defined(__AVR_ATmega168__) \
+   || defined(__AVR_ATmega328P__)
+#  include <arduino/common/wdt.h>
+#elif defined(__AVR_ATmega1280__)
+#  error "arduino/wdt.h: Not implemented for ATmega1280 chips yet"
+#elif defined(__AVR_ATtiny25__) \
+   || defined(__AVR_ATtiny45__) \
+   || defined(__AVR_ATtiny85__)
+#  include <arduino/common/wdt.h>
+#else
+#  error "arduino/wdt.h: Unknown chip type"
+#endif