diff --git a/include/libopencm3/stm32/common/rtc_common_l1f024.h b/include/libopencm3/stm32/common/rtc_common_l1f024.h
index 2b886f16..dfef7d95 100644
--- a/include/libopencm3/stm32/common/rtc_common_l1f024.h
+++ b/include/libopencm3/stm32/common/rtc_common_l1f024.h
@@ -96,6 +96,8 @@ specific memorymap.h header before including this header file.*/
 #define RTC_ALRMASSR    MMIO32(RTC_BASE + 0x44)
 #define RTC_ALRMBSSR    MMIO32(RTC_BASE + 0x48)
 
+#define RTC_OR          MMIO32(RTC_BASE + 0x4c)
+
 #define RTC_BKP_BASE    (RTC_BASE + 0x50)
 /** RTC backup registers (RTC_BKPxR) */
 #define RTC_BKPXR(reg)  MMIO32(RTC_BKP_BASE + (4 * (reg)))
@@ -472,5 +474,3 @@ END_DECLS
 #warning "rtc_common_l1f024.h should not be included explicitly, only via rtc.h"
 #endif
 /** @endcond */
-
-
diff --git a/include/libopencm3/stm32/h7/rtc.h b/include/libopencm3/stm32/h7/rtc.h
new file mode 100644
index 00000000..be2fa2d5
--- /dev/null
+++ b/include/libopencm3/stm32/h7/rtc.h
@@ -0,0 +1,36 @@
+/** @defgroup rtc_defines RTC Defines
+
+@brief <b>Defined Constants and Types for the STM32H7xx RTC</b>
+
+@ingroup STM32H7xx_defines
+
+@version 1.0.0
+
+@date 18 December 2017
+
+LGPL License Terms @ref lgpl_license
+ */
+
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBOPENCM3_RTC_H
+#define LIBOPENCM3_RTC_H
+
+#include <libopencm3/stm32/common/rtc_common_l1f024.h>
+
+#endif
diff --git a/include/libopencm3/stm32/rtc.h b/include/libopencm3/stm32/rtc.h
index 53118d3c..a000944f 100644
--- a/include/libopencm3/stm32/rtc.h
+++ b/include/libopencm3/stm32/rtc.h
@@ -36,7 +36,8 @@
 #       include <libopencm3/stm32/l1/rtc.h>
 #elif defined(STM32L4)
 #       include <libopencm3/stm32/l4/rtc.h>
+#elif defined(STM32H7)
+#       include <libopencm3/stm32/h7/rtc.h>
 #else
 #       error "stm32 family not defined."
 #endif
-