diff --git a/src/saveload/extended_ver_sl.cpp b/src/saveload/extended_ver_sl.cpp
index 37afb00c9f..ee45b2e08a 100644
--- a/src/saveload/extended_ver_sl.cpp
+++ b/src/saveload/extended_ver_sl.cpp
@@ -157,6 +157,7 @@ const SlxiSubChunkInfo _sl_xv_sub_chunk_infos[] = {
 	{ XSLFI_DEPOT_ORDER_EXTRA_FLAGS,XSCF_IGNORABLE_UNKNOWN,   1,   1, "depot_order_extra_flags",   nullptr, nullptr, nullptr        },
 	{ XSLFI_EXTRA_SIGNAL_TYPES,     XSCF_NULL,                1,   1, "extra_signal_types",        nullptr, nullptr, nullptr        },
 	{ XSLFI_BANKRUPTCY_EXTRA,       XSCF_NULL,                1,   1, "bankruptcy_extra",          nullptr, nullptr, nullptr        },
+	{ XSLFI_SCRIPT_INT64,           XSCF_NULL,                1,   1, "script_int64",              nullptr, nullptr, nullptr        },
 	{ XSLFI_NULL, XSCF_NULL, 0, 0, nullptr, nullptr, nullptr, nullptr },// This is the end marker
 };
 
diff --git a/src/saveload/extended_ver_sl.h b/src/saveload/extended_ver_sl.h
index 200f668e20..1182459a5f 100644
--- a/src/saveload/extended_ver_sl.h
+++ b/src/saveload/extended_ver_sl.h
@@ -111,6 +111,7 @@ enum SlXvFeatureIndex {
 	XSLFI_DEPOT_ORDER_EXTRA_FLAGS,                ///< Depot order extra flags
 	XSLFI_EXTRA_SIGNAL_TYPES,                     ///< Extra signal types
 	XSLFI_BANKRUPTCY_EXTRA,                       ///< Extra company bankruptcy fields
+	XSLFI_SCRIPT_INT64,                           ///< See: SLV_SCRIPT_INT64
 
 	XSLFI_RIFF_HEADER_60_BIT,                     ///< Size field in RIFF chunk header is 60 bit
 	XSLFI_HEIGHT_8_BIT,                           ///< Map tile height is 8 bit instead of 4 bit, but savegame version may be before this became true in trunk
diff --git a/src/script/api/script_controller.hpp b/src/script/api/script_controller.hpp
index bc2fc4870a..59da55e719 100644
--- a/src/script/api/script_controller.hpp
+++ b/src/script/api/script_controller.hpp
@@ -39,7 +39,7 @@
  *   data from the loaded game.
  * - Finally, #Start is called to start execution of the script.
  *
- * See also http://wiki.openttd.org/AI:Save/Load for more details.
+ * See also https://wiki.openttd.org/en/Development/Script/Save%20and%20Load for more details.
  *
  * @api ai game
  */
@@ -91,7 +91,7 @@ public:
 	 *   notified of the call. To avoid race-conditions between #Save and the
 	 *   other script code, change variables directly after a #Sleep, it is
 	 *   very unlikely, to get interrupted at that point in the execution.
-	 * See also http://wiki.openttd.org/AI:Save/Load for more details.
+	 * See also https://wiki.openttd.org/en/Development/Script/Save%20and%20Load for more details.
 	 *
 	 * @note No other information is saved than the table returned by #Save.
 	 *   For example all pending events are lost as soon as the game is loaded.
diff --git a/src/script/script_instance.cpp b/src/script/script_instance.cpp
index 9b120113c1..f645260672 100644
--- a/src/script/script_instance.cpp
+++ b/src/script/script_instance.cpp
@@ -388,8 +388,8 @@ static const SaveLoad _script_byte[] = {
 			SQInteger res;
 			sq_getinteger(vm, index, &res);
 			if (!test) {
-				int value = (int)res;
-				SlArray(&value, 1, SLE_INT32);
+				int64 value = (int64)res;
+				SlArray(&value, 1, SLE_INT64);
 			}
 			return true;
 		}
@@ -588,8 +588,8 @@ bool ScriptInstance::IsPaused()
 	SlObject(nullptr, _script_byte);
 	switch (_script_sl_byte) {
 		case SQSL_INT: {
-			int value;
-			SlArray(&value, 1, SLE_INT32);
+			int64 value;
+			SlArray(&value, 1, (IsSavegameVersionBefore(SLV_SCRIPT_INT64) && SlXvIsFeatureMissing(XSLFI_SCRIPT_INT64)) ? SLE_FILE_I32 | SLE_VAR_I64 : SLE_INT64);
 			if (vm != nullptr) sq_pushinteger(vm, (SQInteger)value);
 			return true;
 		}