diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d284948
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/libffi-3.1.tar.gz
diff --git a/sources b/sources
index f24e41b..cb624ab 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-f5898b29bbfd70502831a212d9249d10  libffi-3.1.tar.gz
+SHA512 (libffi-3.1.tar.gz) = 8994973d75facf5ad928c270e17b1a56e24d1543af75b93731a0048e747df27e4190a736b6dc2dca7d43de1d7e88891220304802c10fcccdcebee9c9ffd3d1b9