diff --git a/build.py b/build.py
index 9c81fce..c8d86ac 100755
--- a/build.py
+++ b/build.py
@@ -67,7 +67,7 @@ def run_shell(cmd,failmsg):
 current_docker_images=[x.strip() for x in os.popen('docker images |cut -d" " -f 1 |grep -v none').readlines()]
 
 if 'unreal_engine_4' in req_docker_images:
-    run_shell("cd dockers/unreal_engine_4 && ./prep_unreal",'Error: faild to prepare unreal for installation')
+    run_shell("cd dockers/unreal_engine_4 && ./prep_unreal",'Error: failed to prepare unreal for installation')
     
 
 for docker_image in req_docker_images: