diff --git a/src/i2c.jl b/src/i2c.jl
index 091ad49..6d5bd0d 100644
--- a/src/i2c.jl
+++ b/src/i2c.jl
@@ -453,9 +453,10 @@ the error code).
 ```julia
 (b, d) = i2c_read_i2c_block_data(pi, h, 4, 32)
 if b >= 0
-# process data
+  # process data
 else
-# process read failure
+  # process read failure
+end
 ```
 """
 function i2c_read_i2c_block_data(self::Pi, handle, reg, count)