diff --git a/libc/private/bionic_vdso.h b/libc/private/bionic_vdso.h
index 2d11cd6..ed11501 100644
--- a/libc/private/bionic_vdso.h
+++ b/libc/private/bionic_vdso.h
@@ -33,13 +33,16 @@
 
 #if defined(__aarch64__)
 #define VDSO_CLOCK_GETTIME_SYMBOL "__kernel_clock_gettime"
+#define VDSO_CLOCK_GETRES_SYMBOL  "__kernel_clock_getres"
 #define VDSO_GETTIMEOFDAY_SYMBOL  "__kernel_gettimeofday"
 #else
 #define VDSO_CLOCK_GETTIME_SYMBOL "__vdso_clock_gettime"
+#define VDSO_CLOCK_GETRES_SYMBOL  "__vdso_clock_getres"
 #define VDSO_GETTIMEOFDAY_SYMBOL  "__vdso_gettimeofday"
 #endif
 
 extern "C" int __clock_gettime(int, timespec*);
+extern "C" int __clock_getres(int, timespec*);
 extern "C" int __gettimeofday(timeval*, struct timezone*);
 
 struct vdso_entry {
@@ -49,6 +52,7 @@
 
 enum {
   VDSO_CLOCK_GETTIME = 0,
+  VDSO_CLOCK_GETRES,
   VDSO_GETTIMEOFDAY,
   VDSO_END
 };