diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 88a91a9d52146..64916c6ebf557 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -185,7 +185,7 @@ C23 Feature Support
 - Clang now supports ``N3007 Type inference for object definitions``.
 
 - Clang now supports ``<stdckdint.h>`` which defines several macros for performing
-  checked integer arithmetic.
+  checked integer arithmetic. It is also exposed in pre-C23 modes.
 
 Non-comprehensive list of changes in this release
 -------------------------------------------------
diff --git a/clang/lib/Headers/stdckdint.h b/clang/lib/Headers/stdckdint.h
index 22972d78d9077..20bc34ffb3023 100644
--- a/clang/lib/Headers/stdckdint.h
+++ b/clang/lib/Headers/stdckdint.h
@@ -21,7 +21,6 @@
 
 /* C23 7.20.1 Defines several macros for performing checked integer arithmetic*/
 
-#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L
 #define __STDC_VERSION_STDCKDINT_H__ 202311L
 
 // Both A and B shall be any integer type other than "plain" char, bool, a bit-
@@ -38,7 +37,6 @@
 #define ckd_add(R, A, B) __builtin_add_overflow((A), (B), (R))
 #define ckd_sub(R, A, B) __builtin_sub_overflow((A), (B), (R))
 #define ckd_mul(R, A, B) __builtin_mul_overflow((A), (B), (R))
-#endif
 
 #endif /* __STDC_HOSTED__ */
 #endif /* __STDCKDINT_H */
diff --git a/clang/test/Headers/stdckdint.c b/clang/test/Headers/stdckdint.c
index 896c740360065..6b6d74a89d4c1 100644
--- a/clang/test/Headers/stdckdint.c
+++ b/clang/test/Headers/stdckdint.c
@@ -1,12 +1,14 @@
 // NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 3
+// RUN: %clang_cc1 -triple=x86_64 -emit-llvm -verify -std=c99 %s -o - | FileCheck %s
+// RUN: %clang_cc1 -triple=x86_64 -emit-llvm -verify -std=c11 %s -o - | FileCheck %s
+// RUN: %clang_cc1 -triple=x86_64 -emit-llvm -verify -std=c17 %s -o - | FileCheck %s
 // RUN: %clang_cc1 -triple=x86_64 -emit-llvm -verify -std=c23 %s -o - | FileCheck %s
 
 // expected-no-diagnostics
 
+#include <stdbool.h>
 #include <stdckdint.h>
 
-_Static_assert(__STDC_VERSION_STDCKDINT_H__ == 202311L, "");
-
 // CHECK-LABEL: define dso_local zeroext i1 @test_ckd_add(
 // CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
 // CHECK-NEXT:  entry: