diff --git a/8_macro_expressions.ql b/8_macro_expressions.ql
index 8b13789..00f2a9f 100644
--- a/8_macro_expressions.ql
+++ b/8_macro_expressions.ql
@@ -1 +1,5 @@
+import cpp
 
+from MacroInvocation m
+where m.getMacroName() in ["ntohs", "ntohl", "ntohll"]
+select m.getExpr()
\ No newline at end of file