diff --git a/libtransmission/blocklist.cc b/libtransmission/blocklist.cc
index 4788bba23..62c43ddb9 100644
--- a/libtransmission/blocklist.cc
+++ b/libtransmission/blocklist.cc
@@ -581,10 +581,9 @@ void BlocklistFile::assertValidRules(std::vector<AddressRange> const& ranges)
 
     for (size_t i = 1; i < std::size(ranges_ipv6); ++i)
     {
-        auto last_end_address = ranges_ipv6[i - 1].end6_.s6_addr;
-        auto start_address = ranges_ipv6[i].begin6_.s6_addr;
-
-        TR_ASSERT(memcmp(last_end_address, start_address, sizeof(&start_address)) > 0);
+        auto const& last_end_address = ranges_ipv6[i - 1].end6_;
+        auto const& start_address = ranges_ipv6[i].begin6_;
+        TR_ASSERT(memcmp(&last_end_address, &start_address, sizeof(start_address)) > 0);
     }
 }
 #endif
diff --git a/libtransmission/blocklist.h b/libtransmission/blocklist.h
index 05c66abaa..0e17c5172 100644
--- a/libtransmission/blocklist.h
+++ b/libtransmission/blocklist.h
@@ -11,6 +11,7 @@
 
 #include <cstddef> // for size_t
 #include <cstdint>
+#include <cstring>
 #include <memory>
 #include <string>
 #include <string_view>
diff --git a/libtransmission/crypto-utils.h b/libtransmission/crypto-utils.h
index d97909632..e1158cb59 100644
--- a/libtransmission/crypto-utils.h
+++ b/libtransmission/crypto-utils.h
@@ -32,7 +32,7 @@ public:
     [[nodiscard]] virtual tr_sha1_digest_t finish() = 0;
 
     template<typename... T>
-    [[nodiscard]] static tr_sha1_digest_t digest(T... args)
+    [[nodiscard]] static tr_sha1_digest_t digest(T const&... args)
     {
         auto context = tr_sha1::create();
         (context->add(std::data(args), std::size(args)), ...);
@@ -51,7 +51,7 @@ public:
     [[nodiscard]] virtual tr_sha256_digest_t finish() = 0;
 
     template<typename... T>
-    [[nodiscard]] static tr_sha256_digest_t digest(T... args)
+    [[nodiscard]] static tr_sha256_digest_t digest(T const&... args)
     {
         auto context = tr_sha256::create();
         (context->add(std::data(args), std::size(args)), ...);
diff --git a/utils/show.cc b/utils/show.cc
index 422043ee0..2505b3ad4 100644
--- a/utils/show.cc
+++ b/utils/show.cc
@@ -345,8 +345,8 @@ void doScrape(tr_torrent_metainfo const& metainfo)
         fflush(stdout);
 
         // execute the http scrape
-        curl_easy_setopt(curl, CURLOPT_URL, scrape_url.c_str());
-        curl_easy_setopt(curl, CURLOPT_TIMEOUT, TimeoutSecs);
+        (void)curl_easy_setopt(curl, CURLOPT_URL, scrape_url.c_str());
+        (void)curl_easy_setopt(curl, CURLOPT_TIMEOUT, TimeoutSecs);
         if (auto const res = curl_easy_perform(curl); res != CURLE_OK)
         {
             fmt::print("error: {:s}\n", curl_easy_strerror(res));