diff --git a/bin/miaou-bash b/bin/miaou-bash
index 3062b6b..419a029 100755
--- a/bin/miaou-bash
+++ b/bin/miaou-bash
@@ -9,7 +9,7 @@ readonly MIAOU_BASH_ERROR MIAOU_BASH_DEBUG
 # FUNCTIONS
 
 function is_true {
-  [[ "${1,,}" =~ ^(true|yes|1)$ ]]
+  [[ "${1,,}" =~ ^(true|yes|1)$ ]] #${1,,} => Lowercase all chars
 }
 
 # overridden function which permits backtracing of original `return` statement