diff --git a/src/basic/confidential-virt.c b/src/basic/confidential-virt.c
index 3d4e9eac33..e00576a713 100644
--- a/src/basic/confidential-virt.c
+++ b/src/basic/confidential-virt.c
@@ -130,7 +130,7 @@ static uint64_t msr(uint64_t index) {
                                 index);
                 return 0;
         } else if (rv != sizeof(ret)) {
-                log_debug("Short read %ld bytes from MSR device %s (index %" PRIu64 "), ignoring",
+                log_debug("Short read %zd bytes from MSR device %s (index %" PRIu64 "), ignoring",
                           rv,
                           MSR_DEVICE,
                           index);