1 files changed, 1 insertions, 0 deletions
diff --git a/Meter.h b/Meter.h
index ff691286..cd9c9b8e 100644
--- a/Meter.h
+++ b/Meter.h
@@ -10,6 +10,7 @@ in the source distribution for its full text.
 #include "config.h" // IWYU pragma: keep
 
 #include <stdbool.h>
+#include <stddef.h>
 #include <stdint.h>
 #include <sys/time.h>