diff --git a/os/hal/ports/STM32/LLD/DACv1/hal_dac_lld.c b/os/hal/ports/STM32/LLD/DACv1/hal_dac_lld.c
index c4c34fa78..212c25a21 100644
--- a/os/hal/ports/STM32/LLD/DACv1/hal_dac_lld.c
+++ b/os/hal/ports/STM32/LLD/DACv1/hal_dac_lld.c
@@ -668,7 +668,11 @@ void dac_lld_start_conversion(DACDriver *dacp) {
     dmaStreamSetPeripheral(dacp->dma, &dacp->params->dac->DHR12R1 +
                                       dacp->params->dataoffset);
     dmamode = dacp->params->dmamode |
-              STM32_DMA_CR_PSIZE_WORD | STM32_DMA_CR_MSIZE_HWORD;
+#if STM32_DMA_ADVANCED == FALSE
+              STM32_DMA_CR_PSIZE_WORD  | STM32_DMA_CR_MSIZE_HWORD;
+#else
+              STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD;
+#endif
     break;
   case DAC_DHRM_12BIT_LEFT:
     osalDbgAssert(dacp->grpp->num_channels == 1, "invalid number of channels");
@@ -676,7 +680,11 @@ void dac_lld_start_conversion(DACDriver *dacp) {
     dmaStreamSetPeripheral(dacp->dma, &dacp->params->dac->DHR12L1 +
                                       dacp->params->dataoffset);
     dmamode = dacp->params->dmamode |
-              STM32_DMA_CR_PSIZE_WORD | STM32_DMA_CR_MSIZE_HWORD;
+#if STM32_DMA_ADVANCED == FALSE
+              STM32_DMA_CR_PSIZE_WORD  | STM32_DMA_CR_MSIZE_HWORD;
+#else
+              STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD;
+#endif
     break;
   case DAC_DHRM_8BIT_RIGHT:
     osalDbgAssert(dacp->grpp->num_channels == 1, "invalid number of channels");
@@ -684,7 +692,11 @@ void dac_lld_start_conversion(DACDriver *dacp) {
     dmaStreamSetPeripheral(dacp->dma, &dacp->params->dac->DHR8R1 +
                                       dacp->params->dataoffset);
     dmamode = dacp->params->dmamode |
-              STM32_DMA_CR_PSIZE_WORD | STM32_DMA_CR_MSIZE_BYTE;
+#if STM32_DMA_ADVANCED == FALSE
+              STM32_DMA_CR_PSIZE_WORD  | STM32_DMA_CR_MSIZE_BYTE;
+#else
+              STM32_DMA_CR_MSIZE_BYTE  | STM32_DMA_CR_MSIZE_BYTE;
+#endif
 
     /* In this mode the size of the buffer is halved because two samples
        packed in a single dacsample_t element.*/
@@ -712,7 +724,11 @@ void dac_lld_start_conversion(DACDriver *dacp) {
 
     dmaStreamSetPeripheral(dacp->dma, &dacp->params->dac->DHR8RD);
     dmamode = dacp->params->dmamode |
-              STM32_DMA_CR_PSIZE_WORD | STM32_DMA_CR_MSIZE_HWORD;
+#if STM32_DMA_ADVANCED == FALSE
+              STM32_DMA_CR_PSIZE_WORD  | STM32_DMA_CR_MSIZE_HWORD;
+#else
+              STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD;
+#endif
     n /= 2;
     break;
 #endif
diff --git a/readme.txt b/readme.txt
index a81a234a6..07ec722db 100644
--- a/readme.txt
+++ b/readme.txt
@@ -121,7 +121,8 @@
        ARMv7-M and ARMv8-M-ML.
 - NEW: On STM32WBxx added a check on STM32_LSI_ENABLE required by IWDG.
 - NEW: Added SPIv2 support also to STM32WB and STM32WL.
-- FIX: Reverted bug #1100 (backported to 20.3.5)(backported to 21.11.2).
+- FIX: Re-opened and fixed bug #1100
+       (backported to 20.3.5)(backported to 21.11.2).
 - FIX: Fixed invalid cumulative time stat in RT (bug #1222)
        (backported to 21.11.2).
 - FIX: Fixed incorrect type cast in TIME_I2US() (bug #1221)