diff --git a/common/common.cpp b/common/common.cpp
index edba6fb4b..c91ea29c7 100644
--- a/common/common.cpp
+++ b/common/common.cpp
@@ -1652,7 +1652,7 @@ size_t common_lcs(const llama_tokens & a, const llama_tokens & b) {
     size_t a_len = a.size();
     size_t b_len = b.size();
 
-    // initialize the maximum length of the longest common subsequence (LCS)
+    // initialize the maximum length of the longest common substring (LCS)
     size_t max_length = 0;
 
     // use two rows instead of a 2D matrix to optimize space
diff --git a/common/common.h b/common/common.h
index b208d0c7e..554faa3c6 100644
--- a/common/common.h
+++ b/common/common.h
@@ -562,7 +562,7 @@ void common_batch_add(
 // longest common prefix
 size_t common_lcp(const llama_tokens & a, const llama_tokens & b);
 
-// longet common subsequence
+// longest common substring
 size_t common_lcs(const llama_tokens & a, const llama_tokens & b);
 
 //
diff --git a/examples/server/server.cpp b/examples/server/server.cpp
index e0acc4705..07a6ed0e4 100644
--- a/examples/server/server.cpp
+++ b/examples/server/server.cpp
@@ -2008,10 +2008,10 @@ struct server_context {
                     continue;
                 }
 
-                // length of the Longest Common Subsequence between the current slot's prompt and the input prompt
+                // length of the Longest Common Substring between the current slot's prompt and the input prompt
                 int cur_lcs_len = common_lcs(slot.cache_tokens, task.prompt_tokens);
 
-                // fraction of the common subsequence length compared to the current slot's prompt length
+                // fraction of the common substring length compared to the current slot's prompt length
                 float cur_similarity = static_cast<float>(cur_lcs_len) / static_cast<int>(slot.cache_tokens.size());
 
                 // select the current slot if the criteria match