diff --git a/assets/expected1.bin b/assets/expected1.bin
index 67407da..0bfdca3 100644
--- a/assets/expected1.bin
+++ b/assets/expected1.bin
@@ -1 +1 @@
-Gkwy`½?ɲ
\ No newline at end of file
+GŽ­åú ŽŸ‚:
\ No newline at end of file
diff --git a/driver.c b/driver.c
index ea3a6cb..2d7c45d 100644
--- a/driver.c
+++ b/driver.c
@@ -110,9 +110,9 @@ static int gprn_init_t(struct gf256_gprn* gprn)
 
 static ssize_t misc_read(struct file* filp, char __user* buf, size_t length, loff_t* f_pos)
 {
-    GF256_t kernel_buf[1024];
-    size_t  bytes_to_read = length;
-    size_t  chunk;
+    static GF256_t kernel_buf[1024];
+    size_t         bytes_to_read = length;
+    size_t         chunk;
 
     if (!global_gprn)
         return -ENODEV;
diff --git a/prandom.c b/prandom.c
index a5be38c..1587b6d 100644
--- a/prandom.c
+++ b/prandom.c
@@ -54,16 +54,13 @@ GF256_t gf256_gprn_next(struct gf256_gprn* gprn)
 
     for (i = 0; i < POLY_DEGREE; i++)
     {
-        if (gprn->t[i] != 0)
-        {
-            idx      = (gprn->index + i) % POLY_DEGREE;
-            new_byte = GF256_Add(new_byte, GF256_Mul(gprn->t[i], gprn->coeff[idx]));
-        }
+        idx      = (gprn->index + i) % POLY_DEGREE;
+        new_byte = GF256_Add(new_byte, GF256_Mul(gprn->coeff[i], gprn->t[idx]));
     }
 
     // "circular" array
-    gprn->coeff[gprn->index] = new_byte;
-    gprn->index              = (gprn->index + 1) % POLY_DEGREE;
+    gprn->t[gprn->index] = new_byte;
+    gprn->index          = (gprn->index + 1) % POLY_DEGREE;
 
     return new_byte;
 }