diff --git a/src/baguette-crystal-base.cr b/src/baguette-crystal-base.cr
index 7d58c84..61d88dc 100644
--- a/src/baguette-crystal-base.cr
+++ b/src/baguette-crystal-base.cr
@@ -47,7 +47,9 @@ class Baguette::Configuration
 	# - if the configuration files should be ignored
 	# - if this is just a simulation (used to print configuration then quit)
 	def self.option_parser
-		simulation = no_configuration = configuration_file = nil
+		simulation = false
+		no_configuration = false
+		configuration_file = nil
 
 		help = false