diff --git a/libc/include/__llvm-libc-common.h b/libc/include/__llvm-libc-common.h
index d3f8a4e63268a..a0fa506c01ab8 100644
--- a/libc/include/__llvm-libc-common.h
+++ b/libc/include/__llvm-libc-common.h
@@ -9,6 +9,8 @@
 #ifndef LLVM_LIBC_COMMON_H
 #define LLVM_LIBC_COMMON_H
 
+#define __LLVM_LIBC__ 1
+
 #ifdef __cplusplus
 
 #undef __BEGIN_C_DECLS
diff --git a/libc/include/llvm-libc-macros/features-macros.h b/libc/include/llvm-libc-macros/features-macros.h
index 5bc87a68fc0ba..f87ae4ad12408 100644
--- a/libc/include/llvm-libc-macros/features-macros.h
+++ b/libc/include/llvm-libc-macros/features-macros.h
@@ -9,6 +9,4 @@
 #ifndef LLVM_LIBC_MACROS_FEATURES_MACROS_H
 #define LLVM_LIBC_MACROS_FEATURES_MACROS_H
 
-#define __LLVM_LIBC__ 1
-
 #endif // LLVM_LIBC_MACROS_FEATURES_MACROS_H