diff --git a/Frequently-asked-Questions--Common-Questions.md b/Frequently-asked-Questions--Common-Questions.md
index f3bf092..bc5ebb6 100644
--- a/Frequently-asked-Questions--Common-Questions.md
+++ b/Frequently-asked-Questions--Common-Questions.md
@@ -21,8 +21,8 @@ Raylib has no built in timer system. You are expected to keep track of time in y
 ```c
 typedef struct 
 {
-    double StartTime;
-    double Lifetime;
+    double StartTime;   // start time (seconds)
+    double Lifetime;    // lifetime (seconds)
 }Timer;
 
 void StartTimer(Timer* timer, double lifetime)