diff --git a/memory/memkind_kmem_allocator.h b/memory/memkind_kmem_allocator.h
index 42b6e7da4..7176f17e3 100644
--- a/memory/memkind_kmem_allocator.h
+++ b/memory/memkind_kmem_allocator.h
@@ -22,6 +22,7 @@ class MemkindKmemAllocator : public BaseMemoryAllocator {
 
   static bool IsSupported(std::string* msg) {
 #ifdef MEMKIND
+    (void)msg;
     return true;
 #else
     *msg = "Not compiled with MemKind";