diff --git a/build.rs b/build.rs
index 697e46e..ab23bf9 100644
--- a/build.rs
+++ b/build.rs
@@ -6,6 +6,9 @@ fn main() {
         .include(Path::new("shrooms-vb-core/core"))
         .opt_level(2)
         .flag_if_supported("-fno-strict-aliasing")
+        .define("VB_LITTLE_ENDIAN", None)
+        .define("VB_SIGNED_PROPAGATE", None)
+        .define("VB_DIV_GENERIC", None)
         .file(Path::new("shrooms-vb-core/core/vb.c"))
         .compile("vb");
 }
diff --git a/shrooms-vb-core b/shrooms-vb-core
index b4b9131..7e31fbd 160000
--- a/shrooms-vb-core
+++ b/shrooms-vb-core
@@ -1 +1 @@
-Subproject commit b4b9131f3976388b096343725fce1bdf35f4e3df
+Subproject commit 7e31fbd5824d612e26a176aa2946497cfb2aa02e