diff --git a/llvm/include/llvm-c/TargetMachine.h b/llvm/include/llvm-c/TargetMachine.h
index 691abdf..e6f477a 100644
--- a/llvm/include/llvm-c/TargetMachine.h
+++ b/llvm/include/llvm-c/TargetMachine.h
@@ -119,7 +119,9 @@
 
 #ifdef __cplusplus
 }
+#endif
 
+#if defined(__cplusplus) && !defined(LLVM_DO_NOT_INCLUDE_CPP_HEADERS)
 namespace llvm {
   class TargetMachine;
   class Target;
@@ -138,6 +140,6 @@
     return reinterpret_cast<LLVMTargetRef>(const_cast<Target*>(P));
   }
 }
-#endif
+#endif /* defined(__cplusplus) && !defined(LLVM_DO_NOT_INCLUDE_CPP_HEADERS) */
 
 #endif