diff --git a/plat/st/common/include/stm32mp_common.h b/plat/st/common/include/stm32mp_common.h
index 0ff60929f..a1ed1addd 100644
--- a/plat/st/common/include/stm32mp_common.h
+++ b/plat/st/common/include/stm32mp_common.h
@@ -142,6 +142,7 @@ void stm32_display_board_info(uint32_t board_id);
 void stm32mp1_fwu_set_boot_idx(void);
 uint32_t stm32_get_and_dec_fwu_trial_boot_cnt(void);
 void stm32_set_max_fwu_trial_boot_cnt(void);
+void stm32_clear_fwu_trial_boot_cnt(void);
 #endif /* PSA_FWU_SUPPORT */
 
 #endif /* STM32MP_COMMON_H */
diff --git a/plat/st/stm32mp1/stm32mp1_private.c b/plat/st/stm32mp1/stm32mp1_private.c
index 0e6951316..f098eb37e 100644
--- a/plat/st/stm32mp1/stm32mp1_private.c
+++ b/plat/st/stm32mp1/stm32mp1_private.c
@@ -714,4 +714,13 @@ void stm32_set_max_fwu_trial_boot_cnt(void)
 			   TAMP_BOOT_FWU_INFO_CNT_MSK);
 	clk_disable(RTCAPB);
 }
+
+void stm32_clear_fwu_trial_boot_cnt(void)
+{
+	uintptr_t bkpr_fwu_cnt = tamp_bkpr(TAMP_BOOT_FWU_INFO_REG_ID);
+
+	clk_enable(RTCAPB);
+	mmio_clrbits_32(bkpr_fwu_cnt, TAMP_BOOT_FWU_INFO_CNT_MSK);
+	clk_disable(RTCAPB);
+}
 #endif /* PSA_FWU_SUPPORT */