diff --git a/readme.txt b/readme.txt
index 7e7765e8b..f1490f2f9 100644
--- a/readme.txt
+++ b/readme.txt
@@ -77,6 +77,8 @@
 - FIX: Sector count incorrect in STM32G07/8 EFL driver (bug #1085).
 - FIX: Sector size incorrect in STM32F413 EFL driver (bug #1084).
 - NEW: Added dynamic reconfiguration API to lwIP bindings.
+- FIX: Fixed wrong arguments for the cacheBufferInvalidate in the STM32 SPI 
+       demo (bug #1086).
 - FIX: Fixed race condition in HAL MAC driver (bug #1083).
 - FIX: Fixed early interrupts enable in ARMv7-M port (bug #1081).
 - FIX: Fixed I2CD4 interrupt vectors are swapped versus I2CD1-I2CD3 (bug #1080).
diff --git a/testhal/STM32/multi/SPI/main.c b/testhal/STM32/multi/SPI/main.c
index 0ebfca436..6ac32604c 100755
--- a/testhal/STM32/multi/SPI/main.c
+++ b/testhal/STM32/multi/SPI/main.c
@@ -73,8 +73,8 @@ static THD_FUNCTION(spi_thread_1, p) {
     spiExchange(&PORTAB_SPI1, 1,
                 txbuf, rxbuf);          /* Atomic transfer operations.      */
     spiUnselect(&PORTAB_SPI1);          /* Slave Select de-assertion.       */
-    cacheBufferInvalidate(&txbuf[0],    /* Cache invalidation over the      */
-                          sizeof txbuf);/* buffer.                          */
+    cacheBufferInvalidate(&rxbuf[0],    /* Cache invalidation over the      */
+                          sizeof rxbuf);/* buffer.                          */
     spiReleaseBus(&PORTAB_SPI1);        /* Ownership release.               */
   }
 }
@@ -101,8 +101,8 @@ static THD_FUNCTION(spi_thread_2, p) {
     spiExchange(&PORTAB_SPI1, 1,
                 txbuf, rxbuf);          /* Atomic transfer operations.      */
     spiUnselect(&PORTAB_SPI1);          /* Slave Select de-assertion.       */
-    cacheBufferInvalidate(&txbuf[0],    /* Cache invalidation over the      */
-                          sizeof txbuf);/* buffer.                          */
+    cacheBufferInvalidate(&rxbuf[0],    /* Cache invalidation over the      */
+                          sizeof rxbuf);/* buffer.                          */
     spiReleaseBus(&PORTAB_SPI1);        /* Ownership release.               */
   }
 }
@@ -166,8 +166,8 @@ int main(void) {
   spiExchange(&PORTAB_SPI1, 512,
               txbuf, rxbuf);          /* Atomic transfer operations.      */
   spiUnselect(&PORTAB_SPI1);          /* Slave Select de-assertion.       */
-  cacheBufferInvalidate(&txbuf[0],    /* Cache invalidation over the      */
-                        sizeof txbuf);/* buffer.                          */
+  cacheBufferInvalidate(&rxbuf[0],    /* Cache invalidation over the      */
+                        sizeof rxbuf);/* buffer.                          */
 #endif
 
   /*