diff --git a/haiku-games/criticalmass/criticalmass-2.2.recipe b/haiku-games/criticalmass/criticalmass-2.2.recipe
index 9b2d36c491..df78b62767 100644
--- a/haiku-games/criticalmass/criticalmass-2.2.recipe
+++ b/haiku-games/criticalmass/criticalmass-2.2.recipe
@@ -13,6 +13,7 @@ commit="f597cad218830451f2ec7f5985bef23020bf28ec"
 SOURCE_URI="$HOMEPAGE/archive/$commit.tar.gz"
 SOURCE_DIR="critical-mass-$commit"
 SOURCE_FILENAME="criticalamss-$commit.tar.gz"
+CHECKSUM_SHA256="e53a980ec785ac14e67bf5d73013f2cd265cd7477315d1c36260fb72e97f6785"
 
 ARCHITECTURES="x86_gcc2 ?x86 ?x86_64"