diff --git a/compiler/cpp/src/thriftl.ll b/compiler/cpp/src/thriftl.ll
index a7975af..84e02bb 100644
--- a/compiler/cpp/src/thriftl.ll
+++ b/compiler/cpp/src/thriftl.ll
@@ -56,6 +56,11 @@
 %option lex-compat
 
 /**
+ * Our inputs are all single files, so no need for yywrap
+ */
+%option noyywrap
+
+/**
  * Helper definitions, comments, constants, and whatnot
  */