diff --git a/ubb-patgen/ubb-patgen.c b/ubb-patgen/ubb-patgen.c
index 6309119..b730948 100644
--- a/ubb-patgen/ubb-patgen.c
+++ b/ubb-patgen/ubb-patgen.c
@@ -483,15 +483,24 @@ static void send_buffer(const struct mmcclk *clk,
     const char *trigger, int debounce, const struct timespec *debounce_ns,
     const struct timespec *wait_ns)
 {
-	unsigned long phys;
+	struct physmem_vec vec;
+	int n;
 
 	if (physmem_flush(buf, nibbles)) {
 		perror("physmem_flush");
 		exit(1);
 	}
 
-	phys = physmem_xlat((void *) buf);
-	mmc_buffer(clk, buf[0] >> 4, phys, nibbles, mask,
+	n = physmem_xlat_vec((void *) buf, nibbles >> 1, &vec, 1);
+	if (n < 0) {
+		perror("physmem_xlat_vec");
+		exit(1);
+	}
+	if (n != 1) {
+		fprintf(stderr, "physmem_xlat_vec: expected 1, got %d\n", n);
+		exit(1);
+	}
+	mmc_buffer(clk, buf[0] >> 4, vec.addr, nibbles, mask,
 	    trigger, debounce, debounce_ns, wait_ns);
 }