diff --git a/src/saveload/afterload.cpp b/src/saveload/afterload.cpp
--- a/src/saveload/afterload.cpp
+++ b/src/saveload/afterload.cpp
@@ -3023,7 +3023,7 @@ bool AfterLoadGame()
 			/* Make sure last_cargo_accepted_at is copied to elements for every valid input cargo.
 			 * The loading routine should put the original singular value into the first array element. */
 			for (size_t ci = 0; ci < lengthof(i->accepts_cargo); ci++) {
-				if (i->accepts_cargo[ci] != CT_INVALID) {
+				if (IsValidCargoID(i->accepts_cargo[ci])) {
 					i->last_cargo_accepted_at[ci] = i->last_cargo_accepted_at[0];
 				} else {
 					i->last_cargo_accepted_at[ci] = 0;