diff --git a/os/hal/ports/STM32/LLD/TIMv1/gpt_lld.c b/os/hal/ports/STM32/LLD/TIMv1/gpt_lld.c
index 127e9119f..f25f0b869 100644
--- a/os/hal/ports/STM32/LLD/TIMv1/gpt_lld.c
+++ b/os/hal/ports/STM32/LLD/TIMv1/gpt_lld.c
@@ -829,7 +829,7 @@ void gpt_lld_start_timer(GPTDriver *gptp, gptcnt_t interval) {
   gptp->tim->SR    = 0;                         /* Clear pending IRQs.      */
   if (NULL != gptp->config->callback)
     gptp->tim->DIER |= STM32_TIM_DIER_UIE;      /* Update Event IRQ enabled.*/
-  gptp->tim->CR1   = STM32_TIM_CR1_URS | STM32_TIM_CR1_CEN;
+  gptp->tim->CR1 = STM32_TIM_CR1_ARPE | STM32_TIM_CR1_URS | STM32_TIM_CR1_CEN;
 }
 
 /**
diff --git a/readme.txt b/readme.txt
index 806890418..fad9a1890 100644
--- a/readme.txt
+++ b/readme.txt
@@ -73,6 +73,8 @@
 *****************************************************************************
 
 *** 16.1.6 ***
+- HAL: Fixed missing ARPE bit in CR1 initialization on STM32 GPT driver
+       (bug #791).
 - HAL: Fixed wrong DMA definition for STM32F303x8 ADC (bug #790).
 - VAR: Fixed GCC garbage collector discards code in syscalls.c (bug #789).
 - HAL: Fixed Makefile dependencies not generated for .S files (bug #787).