diff --git a/src/script/api/script_log.cpp b/src/script/api/script_log.cpp
--- a/src/script/api/script_log.cpp
+++ b/src/script/api/script_log.cpp
@@ -74,7 +74,7 @@
 	}
 
 	/* Also still print to debug window */
-	DEBUG(script, level, "[%d] [%c] %s", (uint)ScriptObject::GetRootCompany(), logc, log->lines[log->pos]);
+	Debug(script, level, "[{}] [{}] {}", (uint)ScriptObject::GetRootCompany(), logc, log->lines[log->pos]);
 	InvalidateWindowData(WC_AI_DEBUG, 0, ScriptObject::GetRootCompany());
 }