diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index ea126ae70c..051d6b9492 100644
--- a/include/libc-symbols.h
+++ b/include/libc-symbols.h
@@ -856,6 +856,8 @@ for linking")
 # define HIDDEN_BUILTIN_JUMPTARGET(name) HIDDEN_JUMPTARGET(name)
 #endif
 
+#define rtld_hidden_builtin_proto(name, attrs...) rtld_hidden_proto (name, ##attrs)
+
 #if IS_IN (libutil)
 # define libutil_hidden_proto(name, attrs...) hidden_proto (name, ##attrs)
 # define libutil_hidden_tls_proto(name, attrs...) \
diff --git a/include/string.h b/include/string.h
index 81dab39891..27cbde47ef 100644
--- a/include/string.h
+++ b/include/string.h
@@ -144,6 +144,7 @@ libc_hidden_builtin_proto (strcspn)
 libc_hidden_builtin_proto (strlen)
 libc_hidden_builtin_proto (strncmp)
 libc_hidden_builtin_proto (strncpy)
+rtld_hidden_builtin_proto (strncpy)
 libc_hidden_builtin_proto (strpbrk)
 libc_hidden_builtin_proto (stpcpy)
 libc_hidden_builtin_proto (strrchr)