diff --git a/readme.txt b/readme.txt
index d9cceab47..10f6acce2 100644
--- a/readme.txt
+++ b/readme.txt
@@ -141,7 +141,7 @@
 - EX:  Updated LIS302DL to 1.1.0 (backported to 18.2.1).
 - EX:  Updated LPS25H to 1.1.0 (backported to 18.2.1).
 - EX:  Updated LSM303DLHC to 1.1.0 (backported to 18.2.1).
-- HAL: Fixed invalid checks in STM32F37x HAL related to SDADC (bug #973)
+- HAL: Fixed invalid checks in STM32F37x HAL related to SDADC (bug #974)
        (backported to 18.2.2 and 17.6.5).
 - HAL: Fixed option STM32_LSCOSEL not written in STM32L4 HAL (bug #970)
        (backported to 18.2.2 and 17.6.5).