diff --git a/ioctl/test_ioctl.c b/ioctl/test_ioctl.c
index 34152a108..d78acb475 100644
--- a/ioctl/test_ioctl.c
+++ b/ioctl/test_ioctl.c
@@ -33,7 +33,8 @@ static const int32_t test_expFlagVal = 0x12345678;
 static uint32_t test_port;
 static int test_fileDesc, test_devDesc;
 
-typedef uint8_t test_ioctl_buf[64];
+/* Big buffer - BUS FAULT */
+typedef uint8_t test_ioctl_buf[1024];
 
 #define MAX_FAIL       10
 #define PATH_TF        "ioctl_testFile"