diff --git a/src/shared/label.h b/src/shared/label.h
index 72948205f..cb2ec79ee 100644
--- a/src/shared/label.h
+++ b/src/shared/label.h
@@ -24,6 +24,7 @@
 #include <sys/types.h>
 #include <stdbool.h>
 #include <sys/socket.h>
+#include <stdio.h>
 
 int label_init(const char *prefix);
 void label_finish(void);