diff --git a/faiss/IndexIVFPQ.cpp b/faiss/IndexIVFPQ.cpp
index 5d02c5ee0e..0b7f4d05d4 100644
--- a/faiss/IndexIVFPQ.cpp
+++ b/faiss/IndexIVFPQ.cpp
@@ -1046,7 +1046,7 @@ struct IVFPQScannerT : QueryTables {
             const uint8_t* codes,
             SearchResultType& res) const {
         int ht = ivfpq.polysemous_ht;
-        size_t n_hamming_pass = 0, nup = 0;
+        size_t n_hamming_pass = 0;
 
         int code_size = pq.code_size;