diff --git a/llvm/include/llvm-c/Disassembler.h b/llvm/include/llvm-c/Disassembler.h
index d6cbe31..d6f92e5 100644
--- a/llvm/include/llvm-c/Disassembler.h
+++ b/llvm/include/llvm-c/Disassembler.h
@@ -16,7 +16,11 @@
 #define LLVM_C_DISASSEMBLER_H
 
 #include "llvm/Support/DataTypes.h"
+#ifdef __cplusplus
+#include <cstddef>
+#else
 #include <stddef.h>
+#endif
 
 /**
  * @defgroup LLVMCDisassembler Disassembler
@@ -251,4 +255,4 @@
 }
 #endif /* !defined(__cplusplus) */
 
-#endif /* !defined(LLVM_C_DISASSEMBLER_H) */
+#endif /* LLVM_C_DISASSEMBLER_H */
diff --git a/llvm/include/llvm-c/lto.h b/llvm/include/llvm-c/lto.h
index 88b10fd..42c2802 100644
--- a/llvm/include/llvm-c/lto.h
+++ b/llvm/include/llvm-c/lto.h
@@ -16,7 +16,11 @@
 #ifndef LLVM_C_LTO_H
 #define LLVM_C_LTO_H
 
+#ifdef __cplusplus
+#include <cstddef>
+#else
 #include <stddef.h>
+#endif
 #include <sys/types.h>
 
 #ifndef __cplusplus
@@ -105,7 +109,6 @@
 extern const char*
 lto_get_version(void);
 
-
 /**
  * Returns the last error string or NULL if last operation was successful.
  *
@@ -122,7 +125,6 @@
 extern lto_bool_t
 lto_module_is_object_file(const char* path);
 
-
 /**
  * Checks if a file is a loadable object compiled for requested target.
  *
@@ -132,7 +134,6 @@
 lto_module_is_object_file_for_target(const char* path,
                                      const char* target_triple_prefix);
 
-
 /**
  * Checks if a buffer is a loadable object file.
  *
@@ -141,7 +142,6 @@
 extern lto_bool_t
 lto_module_is_object_file_in_memory(const void* mem, size_t length);
 
-
 /**
  * Checks if a buffer is a loadable object compiled for requested target.
  *
@@ -151,7 +151,6 @@
 lto_module_is_object_file_in_memory_for_target(const void* mem, size_t length,
                                               const char* target_triple_prefix);
 
-
 /**
  * Loads an object file from disk.
  * Returns NULL on error (check lto_get_error_message() for details).
@@ -161,7 +160,6 @@
 extern lto_module_t
 lto_module_create(const char* path);
 
-
 /**
  * Loads an object file from memory.
  * Returns NULL on error (check lto_get_error_message() for details).
@@ -254,7 +252,6 @@
 extern void
 lto_module_set_target_triple(lto_module_t mod, const char *triple);
 
-
 /**
  * Returns the number of symbols in the object module.
  *
@@ -263,7 +260,6 @@
 extern unsigned int
 lto_module_get_num_symbols(lto_module_t mod);
 
-
 /**
  * Returns the name of the ith symbol in the object module.
  *
@@ -272,7 +268,6 @@
 extern const char*
 lto_module_get_symbol_name(lto_module_t mod, unsigned int index);
 
-
 /**
  * Returns the attributes of the ith symbol in the object module.
  *
@@ -281,7 +276,6 @@
 extern lto_symbol_attributes
 lto_module_get_symbol_attribute(lto_module_t mod, unsigned int index);
 
-
 /**
  * Returns the module's linker options.
  *
@@ -293,7 +287,6 @@
 extern const char*
 lto_module_get_linkeropts(lto_module_t mod);
 
-
 /**
  * Diagnostic severity.
  *
@@ -395,7 +388,6 @@
 extern lto_bool_t
 lto_codegen_set_debug_model(lto_code_gen_t cg, lto_debug_model);
 
-
 /**
  * Sets which PIC code model to generated.
  * Returns true on error (check lto_get_error_message() for details).
@@ -405,7 +397,6 @@
 extern lto_bool_t
 lto_codegen_set_pic_model(lto_code_gen_t cg, lto_codegen_model);
 
-
 /**
  * Sets the cpu to generate code for.
  *
@@ -414,7 +405,6 @@
 extern void
 lto_codegen_set_cpu(lto_code_gen_t cg, const char *cpu);
 
-
 /**
  * Sets the location of the assembler tool to run. If not set, libLTO
  * will use gcc to invoke the assembler.
@@ -773,4 +763,4 @@
  * @}
  */
 
-#endif
+#endif /* LLVM_C_LTO_H */