diff --git a/daemon/daemon-win32.cc b/daemon/daemon-win32.cc
index 93b326410..0b7caf284 100644
--- a/daemon/daemon-win32.cc
+++ b/daemon/daemon-win32.cc
@@ -43,7 +43,7 @@ static void set_system_error(tr_error& error, DWORD code, char const* message)
 static void do_log_system_error(char const* file, int line, tr_log_level level, DWORD code, char const* message)
 {
     auto const system_message = tr_win32_format_message(code);
-    tr_logAddMessage(file, line, level, "tr_daemon", fmt::format("[tr_daemon] {} ({:#x}): {}", message, code, system_message));
+    tr_logAddMessage(file, line, level, fmt::format("{} ({:#x}): {}", message, code, system_message), "tr_daemon");
 }
 
 #define log_system_error(level, code, message) \
diff --git a/libtransmission/rpc-server.cc b/libtransmission/rpc-server.cc
index 3a83ada06..2922aab6e 100644
--- a/libtransmission/rpc-server.cc
+++ b/libtransmission/rpc-server.cc
@@ -881,8 +881,8 @@ void tr_rpc_server::load(tr_variant const& src)
         // NOTE: bind_address_ is default initialized to INADDR_ANY
         tr_logAddWarn(fmt::format(
             _("The '{key}' setting is '{value}' but must be an IPv4 or IPv6 address or a Unix socket path. Using default value '0.0.0.0'"),
-            fmt::format("key", tr_quark_get_string_view(TR_KEY_rpc_bind_address)),
-            fmt::format("value", bind_address_str_)));
+            fmt::arg("key", tr_quark_get_string_view(TR_KEY_rpc_bind_address)),
+            fmt::arg("value", bind_address_str_)));
     }
 
     if (bind_address_->is_unix_addr())