diff --git a/c_api/IndexIVF_c_ex.cpp b/c_api/IndexIVF_c_ex.cpp
index 274cc063d4..1fbec3aec0 100644
--- a/c_api/IndexIVF_c_ex.cpp
+++ b/c_api/IndexIVF_c_ex.cpp
@@ -7,7 +7,7 @@
 
 // Copyright 2023-present Facebook. All Rights Reserved.
 // -*- c++ -*-
-#include "IndexIVF_c.h"
+#include "IndexIVF_c_ex.h"
 #include <faiss/IndexIVF.h>
 #include "macros_impl.h"
 
@@ -19,4 +19,4 @@ int faiss_IndexIVF_set_direct_map(FaissIndexIVF* index, int direct_map_type) {
                 static_cast<faiss::DirectMap::Type>(direct_map_type));
     }
     CATCH_AND_HANDLE
-}
\ No newline at end of file
+}