diff --git a/clang/include/clang/Basic/Builtins.def b/clang/include/clang/Basic/Builtins.def
index 0ac2fab8a03a..d30a7c84ef17 100644
--- a/clang/include/clang/Basic/Builtins.def
+++ b/clang/include/clang/Basic/Builtins.def
@@ -141,6 +141,7 @@ BUILTIN(__builtin_stdarg_start, "vA.", "n")
 BUILTIN(__builtin_bcmp, "iv*v*z", "n")
 BUILTIN(__builtin_bcopy, "vv*v*z", "n")
 BUILTIN(__builtin_bzero, "vv*z", "n")
+BUILTIN(__builtin_memchr, "v*vC*iz", "nF")
 BUILTIN(__builtin_memcmp, "ivC*vC*z", "nF")
 BUILTIN(__builtin_memcpy, "v*v*vC*z", "nF")
 BUILTIN(__builtin_memmove, "v*v*vC*z", "nF")