diff --git a/src/Log.h b/src/Log.h
index 2884b7e25d..e9359a900d 100644
--- a/src/Log.h
+++ b/src/Log.h
@@ -13,11 +13,16 @@
 
 #include "types.h"
 
+// Put at the beginning of a C++ file that needs its own log partition
 #define SETUP_LOG()	static LogPartition logPartition(__FILE__)
 
-#define tLog(c,x)	if (!logPartition.doLog(x) || !(c)) do {} while(0); else Log(x)
+// Standard conditional log
 #define cLog(x)		if (!logPartition.doLog(x)) do {} while (0); else Log(x)
 
+// Log only if an additional condition 'c' is true. Condition is not computed if not needed
+#define tLog(c,x)	if (!logPartition.doLog(x) || !(c)) do {} while(0); else Log(x)
+
+
 enum LogSeverity
 {
 	lsTRACE		= 0,