diff --git a/Library/Homebrew/brew.sh b/Library/Homebrew/brew.sh
index 747f6236e2..31d41077e9 100644
--- a/Library/Homebrew/brew.sh
+++ b/Library/Homebrew/brew.sh
@@ -391,9 +391,6 @@ auto-update() {
     unset HOMEBREW_AUTO_UPDATING
     unset HOMEBREW_AUTO_UPDATE_TAP
 
-    # Restore user path as it'll be refiltered by HOMEBREW_BREW_FILE (bin/brew)
-    export PATH=${HOMEBREW_PATH}
-
     # exec a new process to set any new environment variables.
     exec "${HOMEBREW_BREW_FILE}" "$@"
   fi
diff --git a/bin/brew b/bin/brew
index e83837eced..91a687ec55 100755
--- a/bin/brew
+++ b/bin/brew
@@ -57,6 +57,12 @@ do
 done
 unset cmd
 
+# Take the HOMEBREW_PATH if we are running brew within brew, otherwise we would lose the original path.
+if [[ -n "${HOMEBREW_BREW_FILE:-}" && -n "${HOMEBREW_PATH:-}" ]]
+then
+  PATH="${HOMEBREW_PATH}"
+fi
+
 BREW_FILE_DIRECTORY="$(quiet_cd "${0%/*}/" && pwd -P)"
 HOMEBREW_BREW_FILE="${BREW_FILE_DIRECTORY%/}/${0##*/}"
 HOMEBREW_PREFIX="${HOMEBREW_BREW_FILE%/*/*}"