diff --git a/aegisub/src/auto4_lua_utils.h b/aegisub/src/auto4_lua_utils.h
index d64f37263..92181c993 100644
--- a/aegisub/src/auto4_lua_utils.h
+++ b/aegisub/src/auto4_lua_utils.h
@@ -33,6 +33,7 @@ inline void push_value(lua_State *L, const char *value) { lua_pushstring(L, valu
 inline void push_value(lua_State *L, double value) { lua_pushnumber(L, value); }
 inline void push_value(lua_State *L, int value) { lua_pushinteger(L, value); }
 inline void push_value(lua_State *L, size_t value) { lua_pushinteger(L, value); }
+inline void push_value(lua_State *L, int64_t value) { lua_pushinteger(L, value); }
 inline void push_value(lua_State *L, long value) { lua_pushinteger(L, value); }
 inline void push_value(lua_State *L, void *p) { lua_pushlightuserdata(L, p); }