diff --git a/cook.sh b/cook.sh
index ce062f02d..58ebc4a4d 100755
--- a/cook.sh
+++ b/cook.sh
@@ -13,8 +13,10 @@ export DEBUG=
 export EXAMPLES=
 export PREPARE_COPY=1
 
-SHASUM="sha256sum"
-if hash shasum 2>/dev/null; then
+if hash sha256sum 2>/dev/null
+then
+    SHASUM="sha256sum"
+else
     SHASUM="shasum -a 256"
 fi