diff --git a/src/io/iomap.cpp b/src/io/iomap.cpp
index d39988caa71..255cc4f9509 100644
--- a/src/io/iomap.cpp
+++ b/src/io/iomap.cpp
@@ -57,7 +57,7 @@ void IOMap::loadMap(Map* map, const Position &pos) {
 	uint32_t majorVersionItems = stream.getU32();
 	stream.getU32(); // minorVersionItems
 
-	if (version > 2) {
+	if (version > 5) {
 		throw IOMapException("Unknown OTBM version detected.");
 	}