Include what you spell

PiperOrigin-RevId: 551833253
Change-Id: If860b0998c6b9b1c6d42dbdf3ff117f9c03d6ce1
diff --git a/lifetime_annotations/test/named_func_lifetimes.cc b/lifetime_annotations/test/named_func_lifetimes.cc
index 80c25f1..87efb90 100644
--- a/lifetime_annotations/test/named_func_lifetimes.cc
+++ b/lifetime_annotations/test/named_func_lifetimes.cc
@@ -8,6 +8,7 @@
 #include <optional>
 #include <string>
 
+#include "lifetime_annotations/function_lifetimes.h"
 #include "llvm/ADT/DenseMap.h"
 
 namespace clang {