diff --git a/os/io/platforms/STM32/stm32_dma.c b/os/io/platforms/STM32/stm32_dma.c
index 7368f1bb9..9593a5f51 100644
--- a/os/io/platforms/STM32/stm32_dma.c
+++ b/os/io/platforms/STM32/stm32_dma.c
@@ -45,11 +45,8 @@ static cnt_t dmacnt2;
 void dmaInit(void) {
 
   dmacnt1 = 0;
-  DMA1->IFCR = 0x0FFFFFFF;
-
 #if defined(STM32F10X_HD) || defined (STM32F10X_CL)
   dmacnt2 = 0;
-  DMA2->IFCR = 0x0FFFFFFF;
 #endif
 }
 
@@ -62,13 +59,17 @@ void dmaEnable(uint32_t dma) {
 
   switch (dma) {
   case DMA1_ID:
-    if (dmacnt1++ == 0)
+    if (dmacnt1++ == 0) {
       RCC->AHBENR |= RCC_AHBENR_DMA1EN;
+      DMA1->IFCR = 0x0FFFFFFF;
+    }
     break;
 #if defined(STM32F10X_HD) || defined (STM32F10X_CL)
   case DMA2_ID:
-    if (dmacnt2++ == 0)
+    if (dmacnt2++ == 0) {
       RCC->AHBENR |= RCC_AHBENR_DMA2EN;
+      DMA2->IFCR = 0x0FFFFFFF;
+    }
     break;
 #endif
   }
diff --git a/readme.txt b/readme.txt
index f9094ef39..ca32b3d11 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,6 +3,9 @@
 *****************************************************************************
 
 *** 1.3.4 ***
+- FIX: Fixed wrong conditional in chschd.c (bug 2888836).
+- FIX: Fixed wrong macro in chheap.c (bug 2888833).
+- FIX: Fixed AIC initialization in AT91SAM7X support (bug 2888583).
 - NEW: New SPI (master) driver model.
 - NEW: SPI driver for STM32 implementing the new SPI driver model.