diff --git a/components/bsa/ba2file.cpp b/components/bsa/ba2file.cpp
index c8c3ad2cad..673fb5505b 100644
--- a/components/bsa/ba2file.cpp
+++ b/components/bsa/ba2file.cpp
@@ -49,7 +49,7 @@ namespace Bsa
     uint32_t generateExtensionHash(std::string_view extension)
     {
         uint32_t result = 0;
-        for (size_t i = 0; i < 3 && i < extension.size(); i++)
+        for (size_t i = 0; i < 4 && i < extension.size(); i++)
             result |= static_cast<uint8_t>(extension[i]) << (8 * i);
         return result;
     }