diff --git a/third_party/libuweave/src/macaroon.h b/third_party/libuweave/src/macaroon.h
index 310f988..09c0459 100644
--- a/third_party/libuweave/src/macaroon.h
+++ b/third_party/libuweave/src/macaroon.h
@@ -110,8 +110,8 @@
 }
 
 /** Converts a unix timestamp to a j2000 timestamp. */
-static inline time_t uw_macaroon_unix_epoch_to_j2000(time_t unix) {
-  return unix - J2000_EPOCH_OFFSET;
+static inline time_t uw_macaroon_unix_epoch_to_j2000(time_t unix_timestamp) {
+  return unix_timestamp - J2000_EPOCH_OFFSET;
 }
 
 /**