diff --git a/Library/Homebrew/cmd/update.sh b/Library/Homebrew/cmd/update.sh
index 963e13a542cfa..44a6ebdf404ab 100644
--- a/Library/Homebrew/cmd/update.sh
+++ b/Library/Homebrew/cmd/update.sh
@@ -53,7 +53,7 @@ rename_taps_dir_if_necessary() {
       user="$(echo "${tap_dir_basename%-*}" | tr "[:upper:]" "[:lower:]")"
       repo="$(echo "${tap_dir_basename:${#user}+1}" | tr "[:upper:]" "[:lower:]")"
       mkdir -p "$HOMEBREW_LIBRARY/Taps/$user"
-      mv "$tap_dir", "$HOMEBREW_LIBRARY/Taps/$user/homebrew-$repo"
+      mv "$tap_dir" "$HOMEBREW_LIBRARY/Taps/$user/homebrew-$repo"
 
       if [[ ${#${tap_dir_basename//[^\-]}} -gt 1 ]]
       then