diff --git a/poky-init-build-env b/poky-init-build-env
index 82590f2..3c8aa53 100755
--- a/poky-init-build-env
+++ b/poky-init-build-env
@@ -25,7 +25,7 @@
 # being sourced.   To workaround the shell limitation use "set arg1" prior 
 # to sourcing this script.
 #
-if [ "x$0" = "x./poky-init-build-env" ]; then
+if [ -z "$ZSH_NAME" ] && [ "x$0" = "x./poky-init-build-env" ]; then
    echo "Error: This script needs to be sourced. Please run as '. ./poky-init-build-env'"
 else
    if [ -n "$BASH_SOURCE" ]; then