--- old/src/jdk.jextract/share/classes/com/sun/tools/jextract/JavaSourceFactoryExt.java	2019-04-10 19:42:00.000000000 +0530
+++ new/src/jdk.jextract/share/classes/com/sun/tools/jextract/JavaSourceFactoryExt.java	2019-04-10 19:41:58.000000000 +0530
@@ -130,7 +130,7 @@
             String name = macroTree.name();
             MacroParser.Macro macro = macroTree.macro().get();
             log.print(Level.FINE, () -> "Adding macro " + name);
-            addConstant(header_jsb, name, macro.type(), macro.value());
+            addConstant(header_jsb, Utils.toMacroName(name), macro.type(), macro.value());
             return true;
         } else {
             return false;