diff --git a/libgit2-sys/lib.rs b/libgit2-sys/lib.rs
index b1c4bdf5eb..7cb1ad055e 100644
--- a/libgit2-sys/lib.rs
+++ b/libgit2-sys/lib.rs
@@ -1102,6 +1102,7 @@ pub const GIT_DIFF_ENABLE_FAST_UNTRACKED_DIRS: git_diff_option_t = 1 << 14;
 pub const GIT_DIFF_UPDATE_INDEX: git_diff_option_t = 1 << 15;
 pub const GIT_DIFF_INCLUDE_UNREADABLE: git_diff_option_t = 1 << 16;
 pub const GIT_DIFF_INCLUDE_UNREADABLE_AS_UNTRACKED: git_diff_option_t = 1 << 17;
+pub const GIT_DIFF_INDENT_HEURISTIC: git_diff_option_t = 1 << 18;
 pub const GIT_DIFF_FORCE_TEXT: git_diff_option_t = 1 << 20;
 pub const GIT_DIFF_FORCE_BINARY: git_diff_option_t = 1 << 21;
 pub const GIT_DIFF_IGNORE_WHITESPACE: git_diff_option_t = 1 << 22;
@@ -1112,7 +1113,6 @@ pub const GIT_DIFF_SHOW_UNMODIFIED: git_diff_option_t = 1 << 26;
 pub const GIT_DIFF_PATIENCE: git_diff_option_t = 1 << 28;
 pub const GIT_DIFF_MINIMAL: git_diff_option_t = 1 << 29;
 pub const GIT_DIFF_SHOW_BINARY: git_diff_option_t = 1 << 30;
-pub const GIT_DIFF_INDENT_HEURISTIC: git_diff_option_t = 1 << 31;
 
 #[repr(C)]
 pub struct git_diff_find_options {
diff --git a/libgit2-sys/libgit2 b/libgit2-sys/libgit2
index 771dfd1dd1..4ef2b889a4 160000
--- a/libgit2-sys/libgit2
+++ b/libgit2-sys/libgit2
@@ -1 +1 @@
-Subproject commit 771dfd1dd1c27a4693dfdfea521c07e72f456b29
+Subproject commit 4ef2b889a45496f2afc8df1c5570ffc90e650bfa
diff --git a/src/transport.rs b/src/transport.rs
index d34db9f88b..4762c38ba5 100644
--- a/src/transport.rs
+++ b/src/transport.rs
@@ -107,6 +107,7 @@ struct RawSmartSubtransportStream {
 pub unsafe fn register<F>(prefix: &str, factory: F) -> Result<(), Error>
     where F: Fn(&Remote) -> Result<Transport, Error> + Send + Sync + 'static
 {
+    libgit2_sys::init();
     let mut data = Box::new(TransportData {
         factory: Box::new(factory),
     });