diff --git a/os/hal/ports/STM32/LLD/OTGv1/hal_usb_lld.h b/os/hal/ports/STM32/LLD/OTGv1/hal_usb_lld.h
index 69a5ab603..4d7ae1593 100644
--- a/os/hal/ports/STM32/LLD/OTGv1/hal_usb_lld.h
+++ b/os/hal/ports/STM32/LLD/OTGv1/hal_usb_lld.h
@@ -229,9 +229,9 @@
 #define STM32_USBCLK                        STM32_48CLK
 #elif  defined(STM32H7XX)
 /* Defines directly STM32_USBCLK.*/
-#define rccEnableOTG_FS                     rccEnableUSB2_OTG_HS
-#define rccDisableOTG_FS                    rccDisableUSB2_OTG_HS
-#define rccResetOTG_FS                      rccResetUSB2_OTG_HS
+#define rccEnableOTG_FS                     rccEnableUSB2_OTG_FS
+#define rccDisableOTG_FS                    rccDisableUSB2_OTG_FS
+#define rccResetOTG_FS                      rccResetUSB2_OTG_FS
 #define rccEnableOTG_HS                     rccEnableUSB1_OTG_HS
 #define rccDisableOTG_HS                    rccDisableUSB1_OTG_HS
 #define rccResetOTG_HS                      rccResetUSB1_OTG_HS
diff --git a/readme.txt b/readme.txt
index 4e3a92d4f..0c8bfbc41 100644
--- a/readme.txt
+++ b/readme.txt
@@ -123,6 +123,8 @@
        MEMS Accelerometers.
 - NEW: Safer messages mechanism for sandboxes (to be backported to 20.3.1).
 - NEW: Added latency measurement test application.
+- FIX: Fixed OTG_FS error on STM32H7 (bug #1135)
+       (backported to 20.3.3)(backported to 19.1.5).
 - FIX: Fixed compile error of STM32 CRYPv1 driver when DMAMU is present
        (bug #1134)(backported to 20.3.3).
 - FIX: Fixed moved define into hal_wspi_lld.c (bug #1133)