diff --git a/App/driver/py25q16.c b/App/driver/py25q16.c
index 874f8c9a..bc23f043 100644
--- a/App/driver/py25q16.c
+++ b/App/driver/py25q16.c
@@ -40,7 +40,7 @@
 
 static uint32_t SectorCacheAddr = 0x1000000;
 static uint8_t SectorCache[SECTOR_SIZE];
-static uint8_t BlackHole[1];
+static uint8_t BlackHole[4] __attribute__((aligned(4)));
 static volatile bool TC_Flag;
 
 static inline void CS_Assert()