diff --git a/binding-mri/module_rpg1.rb b/binding-mri/module_rpg1.rb
index 32aa087..5b9286b 100644
--- a/binding-mri/module_rpg1.rb
+++ b/binding-mri/module_rpg1.rb
@@ -72,8 +72,8 @@ module RPG
       self.load_bitmap("Graphics/Icons/", filename)
     end
     def self.panorama(filename, hue)
-	  if Graphics.width == 1280 && File.exist?("Graphics/Panoramas/" + filename + "_16.png")
-		self.load_bitmap("Graphics/Panoramas/", filename + "_16", hue)
+      if Graphics.width == 1280 && File.exist?("Graphics/Panoramas/" + filename + "_16.png")
+        self.load_bitmap("Graphics/Panoramas/", filename + "_16", hue)
       else
       	self.load_bitmap("Graphics/Panoramas/", filename, hue)
       end
@@ -223,7 +223,7 @@ module RPG
       end
       @_animation_sprites = []
       if @_animation.position != 3 or not @@_animations.include?(animation)
-        for i in 0..15
+        for _ in 0..15
           sprite = ::Sprite.new(self.viewport)
           sprite.bitmap = bitmap
           sprite.visible = false
@@ -250,7 +250,7 @@ module RPG
         @@_reference_count[bitmap] = 1
       end
       @_loop_animation_sprites = []
-      for i in 0..15
+      for _ in 0..15
         sprite = ::Sprite.new(self.viewport)
         sprite.bitmap = bitmap
         sprite.visible = false
diff --git a/scripts/DynamicLight.rb b/scripts/DynamicLight.rb
index 73f95d3..1886749 100644
--- a/scripts/DynamicLight.rb
+++ b/scripts/DynamicLight.rb
@@ -81,7 +81,7 @@ class DynamicLight
   end
 
   def has_effect(source)
-    source[2] > 0 && source[3] > 0 && source[4].alpha >= 0 && (source[4].red > 0 || source[4].green > 0 || source[4].blue > 0)
+    source[2] != 0 && source[3] > 0 && source[4].alpha >= 0 && (source[4].red != 0 || source[4].green != 0 || source[4].blue != 0)
   end
 
   #def remove(x, y)
diff --git a/src/etc.h b/src/etc.h
index 151afbb..e314a40 100644
--- a/src/etc.h
+++ b/src/etc.h
@@ -210,7 +210,7 @@ struct LightSource {
 	{};
 
 	bool hasEffect(){
-		return radius > 0.0 && power > 0.0 && color.alpha >= 0.0 && (color.red > 0.0 || color.green > 0.0 || color.blue > 0.0);
+		return radius > 0.0 && power != 0.0 && color.alpha >= 0.0 && (color.red != 0.0 || color.green != 0.0 || color.blue != 0.0);
 	}
 };