diff --git a/src/libbpf_util.h b/src/libbpf_util.h
index 172b707..da94c4c 100644
--- a/src/libbpf_util.h
+++ b/src/libbpf_util.h
@@ -46,7 +46,7 @@ do {				\
 # define libbpf_smp_mb() asm volatile("dmb ish" : : : "memory")
 # define libbpf_smp_rwmb() libbpf_smp_mb()
 #else
-# warning Architecture missing native barrier functions in libbpf_util.h.
+/* Architecture missing native barrier functions. */
 # define libbpf_smp_rmb() __sync_synchronize()
 # define libbpf_smp_wmb() __sync_synchronize()
 # define libbpf_smp_mb() __sync_synchronize()