diff --git a/os/hal/ports/STM32/STM32L4xx/hal_lld.h b/os/hal/ports/STM32/STM32L4xx/hal_lld.h
index d18ed02e2..3722fd0ee 100644
--- a/os/hal/ports/STM32/STM32L4xx/hal_lld.h
+++ b/os/hal/ports/STM32/STM32L4xx/hal_lld.h
@@ -1033,8 +1033,8 @@
 #error "HSI16 not enabled, required by STM32_SAI1SEL"
 #endif
 
-#if ((STM32_SAI2SEL == STM32_SAI1SEL_PLLSAI1) ||                            \
-     (STM32_SAI2SEL == STM32_SAI1SEL_PLLSAI2)) &&                           \
+#if ((STM32_SAI2SEL == STM32_SAI2SEL_PLLSAI1) ||                            \
+     (STM32_SAI2SEL == STM32_SAI2SEL_PLLSAI2)) &&                           \
     (STM32_PLLSRC == STM32_PLLSRC_HSI16)
 #error "HSI16 not enabled, required by STM32_SAI2SEL"
 #endif
@@ -1095,8 +1095,8 @@
       #error "HSE not enabled, required by STM32_SAI1SEL"
     #endif
 
-    #if ((STM32_SAI2SEL == STM32_SAI1SEL_PLLSAI1) |                         \
-         (STM32_SAI2SEL == STM32_SAI1SEL_PLLSAI2)) &&                       \
+    #if ((STM32_SAI2SEL == STM32_SAI2SEL_PLLSAI1) |                         \
+         (STM32_SAI2SEL == STM32_SAI2SEL_PLLSAI2)) &&                       \
         (STM32_PLLSRC == STM32_PLLSRC_HSE)
       #error "HSE not enabled, required by STM32_SAI2SEL"
     #endif
diff --git a/readme.txt b/readme.txt
index d6af48955..19328ead0 100644
--- a/readme.txt
+++ b/readme.txt
@@ -141,6 +141,8 @@
 - 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 incorrect checks on STM32_SAI2SEL option in STM32L4 HAL
+       (bug #968)(backported to 18.2.2 and 17.6.5).
 - HAL: Fixed incorrect handling of PDIV dividers in STM32L4 HAL (bug #967)
        (backported to 18.2.2).
 - HAL: Fixed documentation error in spiStop() (bug #966)(backported