diff --git a/src/journal/compress.c b/src/journal/compress.c
index 1933b87b00..c43849c46a 100644
--- a/src/journal/compress.c
+++ b/src/journal/compress.c
@@ -17,6 +17,7 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
+#include <inttypes.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/mman.h>
@@ -498,7 +499,7 @@ int compress_stream_lz4(int fdf, int fdt, uint64_t max_bytes) {
                 total_out += n;
 
                 if (max_bytes != (uint64_t) -1 && total_out > (size_t) max_bytes) {
-                        log_debug("Compressed stream longer than %zd bytes", max_bytes);
+                        log_debug("Compressed stream longer than %"PRIu64" bytes", max_bytes);
                         return -EFBIG;
                 }
 
@@ -649,7 +650,7 @@ int decompress_stream_lz4(int in, int out, uint64_t max_bytes) {
                 total_out += produced;
 
                 if (max_bytes != (uint64_t) -1 && total_out > (size_t) max_bytes) {
-                        log_debug("Decompressed stream longer than %zd bytes", max_bytes);
+                        log_debug("Decompressed stream longer than %"PRIu64" bytes", max_bytes);
                         r = -EFBIG;
                         goto cleanup;
                 }
diff --git a/src/journal/sd-journal.c b/src/journal/sd-journal.c
index ac75e39312..3c21d4129e 100644
--- a/src/journal/sd-journal.c
+++ b/src/journal/sd-journal.c
@@ -19,6 +19,7 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <inttypes.h>
 #include <linux/magic.h>
 #include <poll.h>
 #include <stddef.h>
@@ -1957,7 +1958,7 @@ _public_ int sd_journal_get_data(sd_journal *j, const char *field, const void **
                                                   &f->compress_buffer, &f->compress_buffer_size,
                                                   field, field_length, '=');
                         if (r < 0)
-                                log_debug_errno(r, "Cannot decompress %s object of length %zu at offset "OFSfmt": %m",
+                                log_debug_errno(r, "Cannot decompress %s object of length %"PRIu64" at offset "OFSfmt": %m",
                                                 object_compressed_to_string(compression), l, p);
                         else if (r > 0) {