diff --git a/core/autocomplete/postprocessing/index.ts b/core/autocomplete/postprocessing/index.ts
index bf0284cb29..3504a069dc 100644
--- a/core/autocomplete/postprocessing/index.ts
+++ b/core/autocomplete/postprocessing/index.ts
@@ -132,6 +132,14 @@ export function postprocessCompletion({
     completion = "\n" + completion;
   }
 
+  if (
+    (llm.model.includes("gemini") || llm.model.includes("gemma")) &&
+    completion.endsWith("<|file_separator|>")
+  ) {
+    // "<|file_separator|>" is 18 characters long
+    completion = completion.slice(0, -18);
+  }
+
   // If prefix ends with space and so does completion, then remove the space from completion
 
   if (prefix.endsWith(" ") && completion.startsWith(" ")) {