diff --git a/.swiftpm/configuration/Package.resolved b/.swiftpm/configuration/Package.resolved
new file mode 100644
index 0000000..3ea8289
--- /dev/null
+++ b/.swiftpm/configuration/Package.resolved
@@ -0,0 +1,32 @@
+{
+  "pins" : [
+    {
+      "identity" : "llama.cpp",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/ggerganov/llama.cpp/",
+      "state" : {
+        "branch" : "master",
+        "revision" : "2fb9267887d24a431892ce4dccc75c7095b0d54d"
+      }
+    },
+    {
+      "identity" : "swift-power-assert",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/kishikawakatsumi/swift-power-assert",
+      "state" : {
+        "revision" : "2fa10dcbbff807fad73b4e2469b43300a50e9bbc",
+        "version" : "0.12.0"
+      }
+    },
+    {
+      "identity" : "swift-syntax",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/apple/swift-syntax.git",
+      "state" : {
+        "revision" : "64889f0c732f210a935a0ad7cda38f77f876262d",
+        "version" : "509.1.1"
+      }
+    }
+  ],
+  "version" : 2
+}
diff --git a/Sources/LLM/LLM.swift b/Sources/LLM/LLM.swift
index d1ca295..41c8b2e 100644
--- a/Sources/LLM/LLM.swift
+++ b/Sources/LLM/LLM.swift
@@ -379,10 +379,10 @@ extension Model {
     
     public func shouldAddBOS() -> Bool {
         let addBOS = llama_add_bos_token(self);
-        guard addBOS != -1 else {
+        guard !addBOS else {
             return llama_vocab_type(self) == LLAMA_VOCAB_TYPE_SPM
         }
-        return addBOS != 0
+        return addBOS
     }
     
     public func decodeOnly(_ token: Token) -> String {