diff --git a/include/llvm/Config/config.h.cmake b/include/llvm/Config/config.h.cmake
index 15321cab930..489d7ed6aeb 100644
--- a/include/llvm/Config/config.h.cmake
+++ b/include/llvm/Config/config.h.cmake
@@ -567,7 +567,7 @@
 #cmakedefine LLVM_MANDIR "${LLVM_MANDIR}"
 
 /* Has gcc/MSVC atomic intrinsics */
-#define LLVM_HAS_ATOMICS ${LLVM_HAS_ATOMICS}
+#cmakedefine01 LLVM_HAS_ATOMICS
 
 /* LLVM architecture name for the native architecture, if available */
 #cmakedefine LLVM_NATIVE_ARCH ${LLVM_NATIVE_ARCH}
diff --git a/include/llvm/Config/llvm-config.h.cmake b/include/llvm/Config/llvm-config.h.cmake
index 59ea122a908..1f748ed4f8d 100644
--- a/include/llvm/Config/llvm-config.h.cmake
+++ b/include/llvm/Config/llvm-config.h.cmake
@@ -47,7 +47,7 @@
 #cmakedefine LLVM_MANDIR "${LLVM_MANDIR}"
 
 /* Has gcc/MSVC atomic intrinsics */
-#define LLVM_HAS_ATOMICS ${LLVM_HAS_ATOMICS}
+#cmakedefine01 LLVM_HAS_ATOMICS
 
 /* LLVM architecture name for the native architecture, if available */
 #cmakedefine LLVM_NATIVE_ARCH ${LLVM_NATIVE_ARCH}