diff --git a/wrapper.py.in b/wrapper.py.in
index 668d946..0424d94 100755
--- a/wrapper.py.in
+++ b/wrapper.py.in
@@ -144,7 +144,7 @@ else:
     env[searchvar] = search
 
 env['RESOURCE_PREPEND'] = "@COMPILED_RESOURCE_DIR@"
-env['FBX_IGNORE_TODO'] = 1
+env['FBX_IGNORE_TODO'] = '1'
 
 # It's probably unnecessary to pipe std
 res = subprocess.run(sys.argv[1:], env=env, stderr=sys.stderr, stdout=sys.stdout)