diff --git a/Cargo.lock b/Cargo.lock
index fb372bc6f4..614a386441 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3174,6 +3174,7 @@ dependencies = [
  "rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "vek 0.9.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "veloren-common 0.3.0",
+ "zerocopy 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -3363,6 +3364,25 @@ name = "xml-rs"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "zerocopy"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "zerocopy-derive 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
+ "synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [metadata]
 "checksum adler32 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "7e522997b529f05601e05166c07ed17789691f562762c7f3b987263d2dedee5c"
 "checksum aho-corasick 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)" = "81ce3d38065e618af2d7b77e10c5ad9a069859b4be3c2250f674af3840d9c8a5"
@@ -3725,3 +3745,5 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum x11-dl 2.18.4 (registry+https://github.com/rust-lang/crates.io-index)" = "be65e1342a3baae65439cd03306778831a3d133b0d20243a7fb83fd5cf403c58"
 "checksum xdg 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d089681aa106a86fade1b0128fb5daf07d5867a509ab036d99988dec80429a57"
 "checksum xml-rs 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "541b12c998c5b56aa2b4e6f18f03664eef9a4fd0a246a55594efae6cc2d964b5"
+"checksum zerocopy 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "992b9b31f80fd4a167f903f879b8ca43d6716cc368ea01df90538baa2dd34056"
+"checksum zerocopy-derive 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "b090467ecd0624026e8a6405d343ac7382592530d54881330b3fc8e400280fa5"
diff --git a/world/Cargo.toml b/world/Cargo.toml
index 4b86cfb732..4c27a4dadf 100644
--- a/world/Cargo.toml
+++ b/world/Cargo.toml
@@ -12,6 +12,7 @@ hashbrown = { version = "0.5.0", features = ["serde", "nightly"] }
 lazy_static = "1.3.0"
 rand = "0.7.0"
 rand_chacha = "0.2.1"
+zerocopy = "0.2.8"
 
 [dev-dependencies]
 minifb = { git = "https://github.com/emoon/rust_minifb.git" }
diff --git a/world/src/sim/mod.rs b/world/src/sim/mod.rs
index 0585e3528c..5c22d573c4 100644
--- a/world/src/sim/mod.rs
+++ b/world/src/sim/mod.rs
@@ -55,9 +55,10 @@ pub struct WorldSim {
 
 impl WorldSim {
     pub fn generate(mut seed: u32) -> Self {
+        let mut seed = &mut seed;
         let mut gen_seed = || {
-            seed = seed_expan::diffuse(seed + 1);
-            seed
+            *seed = seed_expan::diffuse(*seed);
+            *seed
         };
 
         let mut gen_ctx = GenCtx {
@@ -95,11 +96,11 @@ impl WorldSim {
         }
 
         let mut this = Self {
-            seed,
+            seed: *seed,
             chunks,
             locations: Vec::new(),
             gen_ctx,
-            rng: ChaChaRng::from_seed(seed_expan::rng_state(seed)),
+            rng: ChaChaRng::from_seed(seed_expan::rng_state(*seed)),
         };
 
         this.seed_elements();
diff --git a/world/src/util/seed_expan.rs b/world/src/util/seed_expan.rs
index 899c2d435e..61c19e80b7 100644
--- a/world/src/util/seed_expan.rs
+++ b/world/src/util/seed_expan.rs
@@ -1,3 +1,5 @@
+use zerocopy::AsBytes;
+
 /// Simple non-cryptographic diffusion function.
 pub fn diffuse(mut x: u32) -> u32 {
     x = x.wrapping_add(0x7ed55d16).wrapping_add(x << 12);
@@ -16,5 +18,8 @@ pub fn rng_state(mut x: u32) -> [u8; 32] {
         x = diffuse(x);
         *s = x;
     }
-    unsafe { std::mem::transmute(r) }
+    let bytes = r.as_bytes();
+    let mut a: [u8; 32] = [0; 32];
+    a.copy_from_slice(bytes);
+    a
 }