diff --git a/includes/libstd/hash.pat b/includes/libstd/hash.pat
new file mode 100644
index 0000000..ebd3756
--- /dev/null
+++ b/includes/libstd/hash.pat
@@ -0,0 +1,27 @@
+namespace std::hash {
+
+    fn crc32(u128 address, u64 size, u32 init, u32 poly) {
+        u8 byte;
+        u32 crc, mask;
+        
+        crc = init;
+        
+        u64 i;
+        while (i < size) {
+            byte = std::mem::read_unsigned(address + i, 1);
+            crc = crc ^ byte;
+            
+            u8 j;
+            while (j < 8) {
+                mask = u32(-(crc & 1));
+                crc = (crc >> 1) ^ (poly & mask);
+                j = j + 1;
+            }
+            
+            i = i + 1;
+        }
+        
+        return u32(~crc);
+    };
+
+}
\ No newline at end of file