diff --git a/launcher/minecraft/mod/ResourcePack.cpp b/launcher/minecraft/mod/ResourcePack.cpp
index 9f46cd2c..1e9db596 100644
--- a/launcher/minecraft/mod/ResourcePack.cpp
+++ b/launcher/minecraft/mod/ResourcePack.cpp
@@ -117,5 +117,5 @@ bool ResourcePack::applyFilter(QRegularExpression filter) const
 
 bool ResourcePack::valid() const
 {
-    return m_pack_format != 0;
+    return s_pack_format_versions.contains(m_pack_format);
 }