diff --git a/src/saveload/saveload.cpp b/src/saveload/saveload.cpp
index 871be91295..56f4f8a857 100644
--- a/src/saveload/saveload.cpp
+++ b/src/saveload/saveload.cpp
@@ -2310,6 +2310,10 @@ static void SlSaveChunk(const ChunkHandler &ch)
 	/* Don't save any chunk information if there is no save handler. */
 	if (proc == nullptr) return;
 
+	if (ch.special_proc != nullptr) {
+		if (ch.special_proc(ch.id, CSLSO_SHOULD_SAVE_CHUNK) == CSLSOR_DONT_SAVE_CHUNK) return;
+	}
+
 	SlWriteUint32(ch.id);
 	DEBUG(sl, 2, "Saving chunk %c%c%c%c", ch.id >> 24, ch.id >> 16, ch.id >> 8, ch.id);
 
diff --git a/src/saveload/saveload.h b/src/saveload/saveload.h
index 49d4300763..72dc988727 100644
--- a/src/saveload/saveload.h
+++ b/src/saveload/saveload.h
@@ -85,10 +85,12 @@ void SlUnreachablePlaceholder();
 enum ChunkSaveLoadSpecialOp {
 	CSLSO_PRE_LOAD,
 	CSLSO_PRE_LOADCHECK,
+	CSLSO_SHOULD_SAVE_CHUNK,
 };
 enum ChunkSaveLoadSpecialOpResult {
 	CSLSOR_NONE,
 	CSLSOR_LOAD_CHUNK_CONSUMED,
+	CSLSOR_DONT_SAVE_CHUNK,
 };
 typedef ChunkSaveLoadSpecialOpResult ChunkSaveLoadSpecialProc(uint32, ChunkSaveLoadSpecialOp);