diff --git a/main/md5.c b/main/md5.c
index 849a2655356998ed2e9b3b2a5a6992e5277d66dd..5e79729b58332987c6028cb7d7111aaaa75f2186 100644
--- a/main/md5.c
+++ b/main/md5.c
@@ -123,6 +123,7 @@ void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
 {
 	unsigned count;
 	unsigned char *p;
+	uint32_t *in_buf;
 
 	/* Compute number of bytes mod 64 */
 	count = (ctx->bits[0] >> 3) & 0x3F;
@@ -151,8 +152,9 @@ void MD5Final(unsigned char digest[16], struct MD5Context *ctx)
 	byteReverse(ctx->in, 14);
 
 	/* Append length in bits and transform */
-	((uint32_t *) ctx->in)[14] = ctx->bits[0];
-	((uint32_t *) ctx->in)[15] = ctx->bits[1];
+	in_buf = (uint32_t *) ctx->in;
+	in_buf[14] = ctx->bits[0];
+	in_buf[15] = ctx->bits[1];
 
 	MD5Transform(ctx->buf, (uint32_t *) ctx->in);
 	byteReverse((unsigned char *) ctx->buf, 4);