diff --git a/config.h b/config.h
index 03bfc05..2f9176d 100644
--- a/config.h
+++ b/config.h
@@ -20,6 +20,8 @@ static const char *colors[][3]      = {
 	[SchemeSel]  = { col_gray4, col_cyan,  col_cyan  },
 };
 
+static const int refreshrate = 60; /* Hz — set to your monitor's rate (e.g., 60/120/144/165) */
+
 /* tagging */
 static const char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };