src/jdk.jextract/share/classes/com/sun/tools/jextract/JavaSourceFactoryExt.java

@@ -128,11 +128,11 @@
     public Boolean visitMacro(MacroTree macroTree, JType jt) {
         if (super.visitMacro(macroTree, jt)) {
             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;
         }
     }