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-rw-r--r--src/libutil/compression.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libutil/compression.cc b/src/libutil/compression.cc
index ed15761b32a2..c509472b3846 100644
--- a/src/libutil/compression.cc
+++ b/src/libutil/compression.cc
@@ -192,6 +192,7 @@ struct XzSink : CompressionSink
     XzSink(Sink & nextSink, const bool parallel) : nextSink(nextSink)
     {
         lzma_ret ret;
+#ifdef HAVE_LZMA_MT
         if (parallel) {
             lzma_mt mt_options = {};
             mt_options.flags = 0;
@@ -208,6 +209,7 @@ struct XzSink : CompressionSink
             ret = lzma_stream_encoder_mt(
                 &strm, &mt_options);
         } else
+#endif
             ret = lzma_easy_encoder(
                 &strm, 6, LZMA_CHECK_CRC64);