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-rw-r--r--src/backlight/backlight.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backlight/backlight.c b/src/backlight/backlight.c
index 6fcf584667..fd92135fc7 100644
--- a/src/backlight/backlight.c
+++ b/src/backlight/backlight.c
@@ -387,7 +387,7 @@ static int run(int argc, char *argv[]) {
if (!sysname)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Requires a subsystem and sysname pair specifying a backlight device.");
- ss = strndupa(argv[2], sysname - argv[2]);
+ ss = strndupa_safe(argv[2], sysname - argv[2]);
sysname++;