diff --git a/include/flatbuffers/flatc.h b/include/flatbuffers/flatc.h
index f2765d2..5e2709e 100644
--- a/include/flatbuffers/flatc.h
+++ b/include/flatbuffers/flatc.h
@@ -14,18 +14,22 @@
  * limitations under the License.
  */
 
+#ifndef FLATBUFFERS_FLATC_H_
+#define FLATBUFFERS_FLATC_H_
+
 #include <functional>
 #include <limits>
 #include <string>
+
 #include "flatbuffers/flatbuffers.h"
 #include "flatbuffers/idl.h"
 #include "flatbuffers/util.h"
 
-#ifndef FLATC_H_
-#  define FLATC_H_
-
 namespace flatbuffers {
 
+extern void LogCompilerWarn(const std::string &warn);
+extern void LogCompilerError(const std::string &err);
+
 class FlatCompiler {
  public:
   // Output generator for the various programming languages and formats we
@@ -93,4 +97,4 @@
 
 }  // namespace flatbuffers
 
-#endif  // FLATC_H_
+#endif  // FLATBUFFERS_FLATC_H_