1 files changed, 2 insertions, 1 deletions
diff --git a/src/basic/cgroup-util.c b/src/basic/cgroup-util.c
index 639f9f3db1..3945d37c8d 100644
--- a/src/basic/cgroup-util.c
+++ b/src/basic/cgroup-util.c
@@ -53,6 +53,7 @@
 #include "set.h"
 #include "special.h"
 #include "stat-util.h"
+#include "stdio-util.h"
 #include "string-table.h"
 #include "string-util.h"
 #include "unit-name.h"
@@ -716,7 +717,7 @@ int cg_attach(const char *controller, const char *path, pid_t pid) {
         if (pid == 0)
                 pid = getpid();
 
-        snprintf(c, sizeof(c), PID_FMT"\n", pid);
+        xsprintf(c, PID_FMT "\n", pid);
 
         return write_string_file(fs, c, 0);
 }