diff --git a/src/bpf_helpers.h b/src/bpf_helpers.h
index 7d12d3e..e7e1a8a 100644
--- a/src/bpf_helpers.h
+++ b/src/bpf_helpers.h
@@ -177,6 +177,11 @@ enum libbpf_tristate {
 #define __kptr_untrusted __attribute__((btf_type_tag("kptr_untrusted")))
 #define __kptr __attribute__((btf_type_tag("kptr")))
 
+#define bpf_ksym_exists(sym) ({									\
+	_Static_assert(!__builtin_constant_p(!!sym), #sym " should be marked as __weak");	\
+	!!sym;											\
+})
+
 #ifndef ___bpf_concat
 #define ___bpf_concat(a, b) a ## b
 #endif