diff --git a/tiff/reader.go b/tiff/reader.go
index f31569b..0ad1552 100644
--- a/tiff/reader.go
+++ b/tiff/reader.go
@@ -40,7 +40,7 @@
 
 const maxChunkSize = 10 << 20 // 10M
 
-// safeReadtAt is a verbatim copy of internal/saferio.ReadDataAt from the
+// safeReadAt is a verbatim copy of internal/saferio.ReadDataAt from the
 // standard library, which is used to read data from a reader using a length
 // provided by untrusted data, without allocating the entire slice ahead of time
 // if it is large (>maxChunkSize). This allows us to avoid allocating giant