diff --git a/os/hal/ports/STM32/LLD/DACv1/dac_lld.c b/os/hal/ports/STM32/LLD/DACv1/dac_lld.c
index 6988c2cf3..588ba2193 100644
--- a/os/hal/ports/STM32/LLD/DACv1/dac_lld.c
+++ b/os/hal/ports/STM32/LLD/DACv1/dac_lld.c
@@ -288,7 +288,7 @@ void dac_lld_stop(DACDriver *dacp) {
 
 #if STM32_DAC_USE_DAC1_CH1
     if (&DACD1 == dacp) {
-      if ((dacp->params->dac->CR & DAC_CR_EN2) == 0U) {
+      if ((dacp->params->dac->CR & DAC_CR_EN1) == 0U) {
         rccDisableDAC1(false);
       }
     }
@@ -296,7 +296,7 @@ void dac_lld_stop(DACDriver *dacp) {
 
 #if STM32_DAC_USE_DAC1_CH2
     if (&DACD2 == dacp) {
-      if ((dacp->params->dac->CR & DAC_CR_EN1) == 0U) {
+      if ((dacp->params->dac->CR & DAC_CR_EN2) == 0U) {
         rccDisableDAC1(false);
       }
     }
@@ -304,7 +304,7 @@ void dac_lld_stop(DACDriver *dacp) {
 
 #if STM32_DAC_USE_DAC2_CH1
     if (&DACD3 == dacp) {
-      if ((dacp->params->dac->CR & DAC_CR_EN2) == 0U) {
+      if ((dacp->params->dac->CR & DAC_CR_EN1) == 0U) {
         rccDisableDAC2(false);
       }
     }
@@ -312,7 +312,7 @@ void dac_lld_stop(DACDriver *dacp) {
 
 #if STM32_DAC_USE_DAC2_CH2
     if (&DACD4 == dacp) {
-      if ((dacp->params->dac->CR & DAC_CR_EN1) == 0U) {
+      if ((dacp->params->dac->CR & DAC_CR_EN2) == 0U) {
         rccDisableDAC2(false);
       }
     }
@@ -345,9 +345,11 @@ void dac_lld_put_channel(DACDriver *dacp,
       *(&dacp->params->dac->DHR12R1 + dacp->params->dataoffset) = (uint32_t)sample;
 #endif
     }
+#if (STM32_HAS_DAC1_CH2 || STM32_HAS_DAC2_CH2)
     else {
       dacp->params->dac->DHR12R2 = (uint32_t)sample;
     }
+#endif
     break;
   case DAC_DHRM_12BIT_LEFT:
 #if STM32_DAC_DUAL_MODE
@@ -360,9 +362,11 @@ void dac_lld_put_channel(DACDriver *dacp,
       *(&dacp->params->dac->DHR12L1 + dacp->params->dataoffset) = (uint32_t)sample;
 #endif
     }
+#if (STM32_HAS_DAC1_CH2 || STM32_HAS_DAC2_CH2)
     else {
       dacp->params->dac->DHR12L2 = (uint32_t)sample;
     }
+#endif
     break;
   case DAC_DHRM_8BIT_RIGHT:
 #if STM32_DAC_DUAL_MODE
@@ -375,9 +379,11 @@ void dac_lld_put_channel(DACDriver *dacp,
       *(&dacp->params->dac->DHR8R1 + dacp->params->dataoffset) = (uint32_t)sample;
 #endif
     }
+#if (STM32_HAS_DAC1_CH2 || STM32_HAS_DAC2_CH2)
     else {
       dacp->params->dac->DHR8R2 = (uint32_t)sample;
     }
+#endif
     break;
   default:
     osalDbgAssert(false, "unexpected DAC mode");
diff --git a/readme.txt b/readme.txt
index 0211c5b13..b5287b4c1 100644
--- a/readme.txt
+++ b/readme.txt
@@ -73,6 +73,8 @@
 *****************************************************************************
 
 *** 16.1.6 ***
+- HAL: Fixed DAC drier not compiling on STM32F051 and some bitmasks related 
+        to DAC disabling (bug #776).
 - HAL: Fixed addition semicolon in cpp wrapper (bug #774).
 - HAL: Fixed function gpt_lld_polled_delay() is broken on STM32 (bug #775).
 - HAL: Fixed invalid output initialization for STM32 DACx channels 2