diff --git a/src/script/common/c_internal.cpp b/src/script/common/c_internal.cpp
index b19af9f82..6df1f8b7b 100644
--- a/src/script/common/c_internal.cpp
+++ b/src/script/common/c_internal.cpp
@@ -157,9 +157,9 @@ static void script_log(lua_State *L, const std::string &message,
 
 void log_deprecated(lua_State *L, const std::string &message, int stack_depth)
 {
-	static bool configured = false;
-	static bool do_log     = false;
-	static bool do_error   = false;
+	static thread_local bool configured = false;
+	static thread_local bool do_log = false;
+	static thread_local bool do_error = false;
 
 	// Only read settings on first call
 	if (!configured) {
@@ -167,9 +167,10 @@ void log_deprecated(lua_State *L, const std::string &message, int stack_depth)
 		if (value == "log") {
 			do_log = true;
 		} else if (value == "error") {
-			do_log   = true;
+			do_log = true;
 			do_error = true;
 		}
+		configured = true;
 	}
 
 	if (do_log)
diff --git a/src/script/lua_api/l_util.cpp b/src/script/lua_api/l_util.cpp
index ae3e5df3d..28ee39fc8 100644
--- a/src/script/lua_api/l_util.cpp
+++ b/src/script/lua_api/l_util.cpp
@@ -44,7 +44,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 // log([level,] text)
 // Writes a line to the logger.
-// The one-argument version logs to infostream.
+// The one-argument version logs to LL_NONE.
 // The two-argument version accepts a log level.
 // Either the special case "deprecated" for deprecation notices, or any specified in
 // Logger::stringToLevel(name).
diff --git a/src/script/lua_api/l_util.h b/src/script/lua_api/l_util.h
index 5697aab15..9ff91bb53 100644
--- a/src/script/lua_api/l_util.h
+++ b/src/script/lua_api/l_util.h
@@ -37,7 +37,7 @@ private:
 
 	// log([level,] text)
 	// Writes a line to the logger.
-	// The one-argument version logs to infostream.
+	// The one-argument version logs to LL_NONE.
 	// The two-argument version accepts a log level.
 	static int l_log(lua_State *L);