diff --git a/reactos/tools/widl/header.c b/reactos/tools/widl/header.c
index 24cd55344f5..309a4c2a176 100644
--- a/reactos/tools/widl/header.c
+++ b/reactos/tools/widl/header.c
@@ -975,6 +975,15 @@ static void do_write_c_method_def(FILE *header, const type_t *iface, const char
 
   if (type_iface_get_inherit(iface))
     do_write_c_method_def(header, type_iface_get_inherit(iface), name);
+  else if (type_iface_get_stmts(iface) == NULL)
+  {
+    fprintf(header, "#ifndef __cplusplus\n");
+    indent(header, 0);
+    fprintf(header, "char dummy;\n");
+    fprintf(header, "#endif\n");
+    fprintf(header, "\n");
+    return;
+  }
 
   STATEMENTS_FOR_EACH_FUNC(stmt, type_iface_get_stmts(iface))
   {