diff --git a/Library/Homebrew/cmd/shellenv.sh b/Library/Homebrew/cmd/shellenv.sh
index df5ad65fb3..20f52455d4 100644
--- a/Library/Homebrew/cmd/shellenv.sh
+++ b/Library/Homebrew/cmd/shellenv.sh
@@ -50,7 +50,7 @@ homebrew-shellenv() {
       echo "setenv HOMEBREW_REPOSITORY ${HOMEBREW_REPOSITORY};"
       if [[ -n "${PATH_HELPER_ROOT}" ]]
       then
-        echo "PATH_HELPER_ROOT=\"${PATH_HELPER_ROOT}\" /usr/libexec/path_helper -c"
+        echo "eval \`PATH_HELPER_ROOT=\"${PATH_HELPER_ROOT}\" /usr/libexec/path_helper -c\`;"
       else
         echo "setenv PATH ${HOMEBREW_PREFIX}/bin:${HOMEBREW_PREFIX}/sbin:\$PATH;"
       fi
@@ -75,7 +75,7 @@ homebrew-shellenv() {
       fi
       if [[ -n "${PATH_HELPER_ROOT}" ]]
       then
-        echo "PATH_HELPER_ROOT=\"${PATH_HELPER_ROOT}\" /usr/libexec/path_helper -s"
+        echo "eval \"\$(PATH_HELPER_ROOT=\"${PATH_HELPER_ROOT}\" /usr/libexec/path_helper -s)\""
       else
         echo "export PATH=\"${HOMEBREW_PREFIX}/bin:${HOMEBREW_PREFIX}/sbin\${PATH+:\$PATH}\";"
       fi