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-rw-r--r--src/shared/utmp-wtmp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/shared/utmp-wtmp.c b/src/shared/utmp-wtmp.c
index 342e0a9cf1..5d88405e13 100644
--- a/src/shared/utmp-wtmp.c
+++ b/src/shared/utmp-wtmp.c
@@ -190,7 +190,7 @@ int utmp_put_reboot(usec_t t) {
return write_entry_both(&store);
}
-static const char *sanitize_id(const char *id) {
+_pure_ static const char *sanitize_id(const char *id) {
size_t l;
assert(id);