diff --git a/tools/sched_ext/include/scx/common.bpf.h b/tools/sched_ext/include/scx/common.bpf.h
index 18f823d424cc..087ae4f79c60 100644
--- a/tools/sched_ext/include/scx/common.bpf.h
+++ b/tools/sched_ext/include/scx/common.bpf.h
@@ -1043,6 +1043,16 @@ static inline u64 scx_clock_irq(u32 cpu)
 	return irqt ? BPF_CORE_READ(irqt, total) : 0;
 }
 
+/* Abbreviated forms of <linux/overflow.h>'s struct_size() family. */
+#define flex_array_size(p, member, count)	\
+	((count) * sizeof(*(p)->member))
+
+#define struct_size(p, member, count)		\
+	(offsetof(typeof(*(p)), member) + flex_array_size(p, member, count))
+
+#define struct_size_t(type, member, count)	\
+	struct_size((type *)NULL, member, count)
+
 #include "compat.bpf.h"
 #include "enums.bpf.h"