diff --git a/faiss/Clustering.cpp b/faiss/Clustering.cpp
index 31955bd531..1fd33bb2e7 100644
--- a/faiss/Clustering.cpp
+++ b/faiss/Clustering.cpp
@@ -250,7 +250,7 @@ int split_clusters(
     return nsplit;
 }
 
-} // namespace
+}; // namespace
 
 void Clustering::train_encoded(
         idx_t nx,
@@ -617,7 +617,7 @@ void copy_columns(idx_t n, idx_t d1, const float* src, idx_t d2, float* dest) {
     }
 }
 
-} // namespace
+}; // namespace
 
 void ProgressiveDimClustering::train(
         idx_t n,
diff --git a/faiss/IndexIVFSpectralHash.cpp b/faiss/IndexIVFSpectralHash.cpp
index 9a48befc29..dace151270 100644
--- a/faiss/IndexIVFSpectralHash.cpp
+++ b/faiss/IndexIVFSpectralHash.cpp
@@ -157,7 +157,7 @@ void binarize_with_freq(
     }
 }
 
-} // namespace
+}; // namespace
 
 void IndexIVFSpectralHash::encode_vectors(
         idx_t n,
diff --git a/faiss/impl/AdditiveQuantizer.h b/faiss/impl/AdditiveQuantizer.h
index 8eceabe5d6..9a4f4fa375 100644
--- a/faiss/impl/AdditiveQuantizer.h
+++ b/faiss/impl/AdditiveQuantizer.h
@@ -203,4 +203,4 @@ struct AdditiveQuantizer : Quantizer {
     virtual ~AdditiveQuantizer();
 };
 
-} // namespace faiss
+}; // namespace faiss
diff --git a/faiss/impl/ProductAdditiveQuantizer.h b/faiss/impl/ProductAdditiveQuantizer.h
index 9376ba121f..163d341cf2 100644
--- a/faiss/impl/ProductAdditiveQuantizer.h
+++ b/faiss/impl/ProductAdditiveQuantizer.h
@@ -151,4 +151,4 @@ struct ProductResidualQuantizer : ProductAdditiveQuantizer {
     ProductResidualQuantizer();
 };
 
-} // namespace faiss
\ No newline at end of file
+}; // namespace faiss
\ No newline at end of file
diff --git a/faiss/impl/ResidualQuantizer.h b/faiss/impl/ResidualQuantizer.h
index 004f7cabd4..95677d888b 100644
--- a/faiss/impl/ResidualQuantizer.h
+++ b/faiss/impl/ResidualQuantizer.h
@@ -155,4 +155,4 @@ struct ResidualQuantizer : AdditiveQuantizer {
     std::vector<float> cent_norms;
 };
 
-} // namespace faiss
+}; // namespace faiss
diff --git a/faiss/invlists/InvertedLists.cpp b/faiss/invlists/InvertedLists.cpp
index ca87ae00ea..46f31e6286 100644
--- a/faiss/invlists/InvertedLists.cpp
+++ b/faiss/invlists/InvertedLists.cpp
@@ -437,7 +437,7 @@ idx_t translate_list_no(const SliceInvertedLists* sil, idx_t list_no) {
     return list_no + sil->i0;
 }
 
-} // namespace
+}; // namespace
 
 SliceInvertedLists::SliceInvertedLists(
         const InvertedLists* il,
@@ -522,7 +522,7 @@ idx_t sum_il_sizes(int nil, const InvertedLists** ils_in) {
     return tot;
 }
 
-} // namespace
+}; // namespace
 
 VStackInvertedLists::VStackInvertedLists(int nil, const InvertedLists** ils_in)
         : ReadOnlyInvertedLists(
diff --git a/faiss/python/python_callbacks.cpp b/faiss/python/python_callbacks.cpp
index bfcf883aec..c99c1a3f77 100644
--- a/faiss/python/python_callbacks.cpp
+++ b/faiss/python/python_callbacks.cpp
@@ -22,7 +22,7 @@ struct PyThreadLock {
     }
 };
 
-} // namespace
+}; // namespace
 
 /***********************************************************
  * Callbacks for IO reader and writer
diff --git a/faiss/utils/sorting.cpp b/faiss/utils/sorting.cpp
index 76fa5e6201..67dd51bf73 100644
--- a/faiss/utils/sorting.cpp
+++ b/faiss/utils/sorting.cpp
@@ -123,7 +123,7 @@ void parallel_merge(
     }
 }
 
-} // namespace
+}; // namespace
 
 void fvec_argsort(size_t n, const float* vals, size_t* perm) {
     for (size_t i = 0; i < n; i++) {