diff --git a/arch/um/os-Linux/user_syms.c b/arch/um/os-Linux/user_syms.c
index 56d3f87..8da6ab3 100644
--- a/arch/um/os-Linux/user_syms.c
+++ b/arch/um/os-Linux/user_syms.c
@@ -34,6 +34,11 @@
        int sym(void);                  \
        EXPORT_SYMBOL(sym);
 
+extern void readdir64(void) __attribute__((weak));
+EXPORT_SYMBOL(readdir64);
+extern void truncate64(void) __attribute__((weak));
+EXPORT_SYMBOL(truncate64);
+
 #ifdef SUBARCH_i386
 EXPORT_SYMBOL(vsyscall_ehdr);
 EXPORT_SYMBOL(vsyscall_end);