diff --git a/storage/src/vespa/storage/distributor/distributor_bucket_space_repo.cpp b/storage/src/vespa/storage/distributor/distributor_bucket_space_repo.cpp
index 7dea2e621e19..e6de5449b60c 100644
--- a/storage/src/vespa/storage/distributor/distributor_bucket_space_repo.cpp
+++ b/storage/src/vespa/storage/distributor/distributor_bucket_space_repo.cpp
@@ -7,6 +7,7 @@
 #include <vespa/document/bucket/fixed_bucket_spaces.h>
 #include <vespa/vespalib/util/backtrace.h>
 #include <cassert>
+#include <cinttypes>
 
 #include <vespa/log/log.h>
 LOG_SETUP(".distributor.distributor_bucket_space_repo");
@@ -36,7 +37,7 @@ DistributorBucketSpaceRepo::get(BucketSpace bucketSpace)
 {
     auto itr = _map.find(bucketSpace);
     if (itr == _map.end()) [[unlikely]] {
-        LOG(error, "Bucket space %zu does not have a valid mapping. %s", bucketSpace.getId(), vespalib::getStackTrace(0).c_str());
+        LOG(error, "Bucket space %" PRIu64 " does not have a valid mapping. %s", bucketSpace.getId(), vespalib::getStackTrace(0).c_str());
         abort();
     }
     return *itr->second;
@@ -47,7 +48,7 @@ DistributorBucketSpaceRepo::get(BucketSpace bucketSpace) const
 {
     auto itr = _map.find(bucketSpace);
     if (itr == _map.end()) [[unlikely]] {
-        LOG(error, "Bucket space %zu does not have a valid mapping. %s", bucketSpace.getId(), vespalib::getStackTrace(0).c_str());
+        LOG(error, "Bucket space %" PRIu64 " does not have a valid mapping. %s", bucketSpace.getId(), vespalib::getStackTrace(0).c_str());
         abort();
     }
     return *itr->second;
diff --git a/storage/src/vespa/storage/persistence/asynchandler.cpp b/storage/src/vespa/storage/persistence/asynchandler.cpp
index 8e962a598093..a69f9e55afb4 100644
--- a/storage/src/vespa/storage/persistence/asynchandler.cpp
+++ b/storage/src/vespa/storage/persistence/asynchandler.cpp
@@ -319,7 +319,7 @@ AsyncHandler::handle_delete_bucket_throttling(api::DeleteBucketCommand& cmd, Mes
                 LOG(spam, "%s: completed removeByGidAsync operation", bucket.toString().c_str());
                 // Nothing else clever to do here. Throttle token and deleteBucket dispatch refs dropped implicitly.
             });
-        LOG(spam, "%s: about to invoke removeByGidAsync(%s, %s, %zu)", cmd.getBucket().toString().c_str(),
+        LOG(spam, "%s: about to invoke removeByGidAsync(%s, %s, %" PRIu64 ")", cmd.getBucket().toString().c_str(),
             vespalib::string(meta->getDocumentType()).c_str(), meta->getGid().toString().c_str(), meta->getTimestamp().getValue());
         _spi.removeByGidAsync(spi_bucket, std::move(to_remove), std::make_unique<ResultTaskOperationDone>(_sequencedExecutor, cmd.getBucketId(), std::move(task)));
     }