diff --git a/src/coredump/coredump.c b/src/coredump/coredump.c
index 686218525aa..d55d896df49 100644
--- a/src/coredump/coredump.c
+++ b/src/coredump/coredump.c
@@ -111,7 +111,7 @@ static CoredumpStorage arg_storage = COREDUMP_STORAGE_EXTERNAL;
 static bool arg_compress = true;
 static uint64_t arg_process_size_max = PROCESS_SIZE_MAX;
 static uint64_t arg_external_size_max = EXTERNAL_SIZE_MAX;
-static size_t arg_journal_size_max = JOURNAL_SIZE_MAX;
+static uint64_t arg_journal_size_max = JOURNAL_SIZE_MAX;
 static uint64_t arg_keep_free = (uint64_t) -1;
 static uint64_t arg_max_use = (uint64_t) -1;