diff --git a/tools/firmware/ihex2fw.c b/tools/firmware/ihex2fw.c
index e081cef730d80b71c1ed8eac3d8937c9a8c78ee6..8925b60e51f52c07ff8da58de1d31d872d3a6178 100644
--- a/tools/firmware/ihex2fw.c
+++ b/tools/firmware/ihex2fw.c
@@ -135,6 +135,7 @@ int main(int argc, char **argv)
 static int process_ihex(uint8_t *data, ssize_t size)
 {
 	struct ihex_binrec *record;
+	size_t record_size;
 	uint32_t offset = 0;
 	uint32_t data32;
 	uint8_t type, crc = 0, crcbyte = 0;
@@ -161,12 +162,13 @@ static int process_ihex(uint8_t *data, ssize_t size)
 		len <<= 8;
 		len += hex(data + i, &crc); i += 2;
 	}
-	record = malloc((sizeof (*record) + len + 3) & ~3);
+	record_size = ALIGN(sizeof(*record) + len, 4);
+	record = malloc(record_size);
 	if (!record) {
 		fprintf(stderr, "out of memory for records\n");
 		return -ENOMEM;
 	}
-	memset(record, 0, (sizeof(*record) + len + 3) & ~3);
+	memset(record, 0, record_size);
 	record->len = len;
 
 	/* now check if we have enough data to read everything */