diff --git a/third_party/musl/ndk_musl_include/malloc.h b/third_party/musl/ndk_musl_include/malloc.h
index 4817d5a5ebf8ad655c947b290d2771779043beb0..496008ed065bee8b30b339c298b789ed1bf19055 100644
--- a/third_party/musl/ndk_musl_include/malloc.h
+++ b/third_party/musl/ndk_musl_include/malloc.h
@@ -35,6 +35,8 @@ void *memalign(size_t, size_t);
 size_t malloc_usable_size(void *);
 int mallopt(int param, int value);
 
+struct mallinfo mallinfo(void);
+
 struct mallinfo {
   int arena;
   int ordblks;