diff --git a/lib/customer_usage.rb b/lib/customer_usage.rb
index ec3d1eecc3f24314d5a34ff6279f8f97e2c6a0b7..a614a081425bbbfee1aba3cc41c16975f9829d72 100644
--- a/lib/customer_usage.rb
+++ b/lib/customer_usage.rb
@@ -42,6 +42,8 @@ class CustomerUsage
 	end
 
 	def incr_body(amount, body)
+		return 0 unless body
+
 		hash = Digest::SHA2.hexdigest(body[0..100])
 
 		EMPromise.all([