diff --git a/radio/src/opentx.h b/radio/src/opentx.h
index 2b0cbb75b..4f1f4cfbd 100644
--- a/radio/src/opentx.h
+++ b/radio/src/opentx.h
@@ -224,11 +224,11 @@
 #elif defined(PCBSKY9X)
   #define __DMA __attribute__((aligned(32)))
 #elif defined(STM32F4)
-  #define __DMA __attribute__((section(".ram")))
+  #define __DMA __attribute__((section(".ram")) __attribute__((aligned(32))))
 #else
-  #define __DMA
+  #define __DMA __attribute__((aligned(32))) 
 #endif
-
+ 
 #if defined(SIMU) || defined(CPUARM) || GCC_VERSION < 472
   typedef int32_t int24_t;
 #else