diff --git a/types/codemirror/index.d.ts b/types/codemirror/index.d.ts
index d0b2dd6511..561d311540 100644
--- a/types/codemirror/index.d.ts
+++ b/types/codemirror/index.d.ts
@@ -439,7 +439,7 @@ declare namespace CodeMirror {
 
         /** Replace the part of the document between from and to with the given string.
         from and to must be {line, ch} objects. to can be left off to simply insert the string at position from. */
-        replaceRange(replacement: string, from: CodeMirror.Position, to?: CodeMirror.Position): void;
+        replaceRange(replacement: string, from: CodeMirror.Position, to?: CodeMirror.Position, origin?: string): void;
 
         /** Get the content of line n. */
         getLine(n: number): string;