diff --git a/patch.go b/patch.go
index 7e6f71d..75e843c 100644
--- a/patch.go
+++ b/patch.go
@@ -69,7 +69,7 @@ func (v *Repository) PatchFromBuffers(oldPath, newPath string, oldBuf, newBuf []
 	var patchPtr *C.git_patch
 
 	oldPtr := toPointer(oldBuf)
-	newPtr := toPointer(newBuf)
+	newPtr := (*C.char)(toPointer(newBuf))
 
 	cOldPath := C.CString(oldPath)
 	defer C.free(unsafe.Pointer(cOldPath))
diff --git a/vendor/libgit2 b/vendor/libgit2
index 3c21645..15e1193 160000
--- a/vendor/libgit2
+++ b/vendor/libgit2
@@ -1 +1 @@
-Subproject commit 3c21645360a0b06d6ed5f028e9517d65f8e11bc1
+Subproject commit 15e119375018fba121cf58e02a9f17fe22df0df8