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--- src/sintax.cc.orig	2025-10-05 12:34:38 UTC
+++ src/sintax.cc
@@ -295,9 +295,14 @@ auto sintax_search_topscores(struct searchinfo_s * sea
       if (bitmap != nullptr)
         {
 #ifdef __x86_64__
+	  // Not sure how to enable ssse3 without enabling other
+	  // non-portable features.
+	  // This code is only used rarely, so disable ssse3 for now.
+	  // It won't affect performance much on the whole.
+	  // https://github.com/torognes/vsearch/pull/497
           if (ssse3_present != 0)
             {
-              increment_counters_from_bitmap_ssse3(searchinfo->kmers,
+              increment_counters_from_bitmap_sse2(searchinfo->kmers,
                                                    bitmap, indexed_count);
             }
           else