diff --git a/lib/libc/gen/dlfcn.c b/lib/libc/gen/dlfcn.c
--- a/lib/libc/gen/dlfcn.c
+++ b/lib/libc/gen/dlfcn.c
@@ -204,6 +204,8 @@
 #endif
 
 #pragma weak _dl_iterate_phdr_locked
+int _dl_iterate_phdr_locked(int (*callback)(struct dl_phdr_info *,
+    size_t, void *), void *data);
 int
 _dl_iterate_phdr_locked(
     int (*callback)(struct dl_phdr_info *, size_t, void *) __unused,
diff --git a/lib/libdl/Symbol.map b/lib/libdl/Symbol.map
--- a/lib/libdl/Symbol.map
+++ b/lib/libdl/Symbol.map
@@ -22,3 +22,7 @@
 	rtld_get_var;
 	rtld_set_var;
 };
+
+FBSDprivate_1.0 {
+	_dl_iterate_phdr_locked;
+};