diff --git a/build.zig b/build.zig
index 2ac88948c0..1408769c25 100644
--- a/build.zig
+++ b/build.zig
@@ -701,6 +701,7 @@ fn build_single(
             "vortex_v2.c",
             "hashtable_v3.c",
             "manage_v3.c",
+            "manage_v4.c",
             "vortex.c",
             "xtract.c",
             "zave.c",
diff --git a/pkg/noun/manage.c b/pkg/noun/manage.c
index e5dbcab223..7456a2e382 100644
--- a/pkg/noun/manage.c
+++ b/pkg/noun/manage.c
@@ -3,6 +3,7 @@
 #include "manage.h"
 #include "manage_v2.h"
 #include "manage_v3.h"
+#include "manage_v4.h"
 
 #include <ctype.h>
 #include <dlfcn.h>
@@ -613,7 +614,8 @@ _find_home(void)
   switch ( ver_w ) {
     case U3V_VER1: u3m_v2_migrate();
     case U3V_VER2: u3m_v3_migrate();
-    case U3V_VER3: {
+    case U3V_VER3: u3m_v4_migrate();
+    case U3V_VER4: {
       mig_o = c3n;
       break;
     }
diff --git a/pkg/noun/manage_v4.c b/pkg/noun/manage_v4.c
new file mode 100644
index 0000000000..14bfb52b62
--- /dev/null
+++ b/pkg/noun/manage_v4.c
@@ -0,0 +1,30 @@
+/// @file
+
+#include "manage_v4.h"
+#include "stdio.h"
+#include "manage.h"
+#include "allocate.h"
+#include "vortex.h"
+#include "options.h"
+
+/* u3m_v4_migrate: perform loom migration if necessary.
+*/
+void
+u3m_v4_migrate(void)
+{
+  fprintf(stderr, "loom: bytecode alignment migration running...\r\n");
+
+  c3_w* mem_w = u3_Loom + u3a_walign;
+  c3_w  siz_w = c3_wiseof(u3v_home);
+  c3_w  len_w = u3C.wor_i - u3a_walign;
+  c3_w* mat_w = c3_align(mem_w + len_w - siz_w, u3a_balign, C3_ALGLO);
+
+  u3H = (void *)mat_w;
+  u3R = &u3H->rod_u;
+
+  u3m_reclaim();
+
+  u3H->ver_w = U3V_VER4;
+
+  fprintf(stderr, "loom: bytecode alignment migration done\r\n");
+}
diff --git a/pkg/noun/manage_v4.h b/pkg/noun/manage_v4.h
new file mode 100644
index 0000000000..1059f12626
--- /dev/null
+++ b/pkg/noun/manage_v4.h
@@ -0,0 +1,13 @@
+/// @file
+
+#ifndef U3_MANAGE_V4_H
+#define U3_MANAGE_V4_H
+
+    /** System management.
+    **/
+      /* u3m_v3_migrate: perform memoization loom migration if necessary.
+      */
+        void
+        u3m_v4_migrate(void);
+
+#endif /* ifndef U3_MANAGE_V3_H */
diff --git a/pkg/noun/nock.c b/pkg/noun/nock.c
index eb459d17f7..f9814a395f 100644
--- a/pkg/noun/nock.c
+++ b/pkg/noun/nock.c
@@ -706,7 +706,11 @@ _n_prog_new(c3_w byc_w, c3_w cal_w,
        reb_w = (sizeof(u3j_rite) * reg_w),
        lib_w = (sizeof(u3_noun) * lit_w),
        meb_w = (sizeof(u3n_memo) * mem_w),
-       dat_w = byc_w + cab_w + reb_w + lib_w + meb_w;
+       pad_w = (8 - byc_w % 8) % 8,
+       pod_w = lit_w % 2,
+       ped_w = mem_w % 2,
+       dat_w = byc_w + cab_w + reb_w + lib_w + meb_w + pad_w +
+               (pod_w * sizeof(u3_noun)) + (ped_w * sizeof(u3n_memo));
 
   u3n_prog* pog_u     = u3a_malloc(sizeof(u3n_prog) + dat_w);
   pog_u->byc_u.own_o = c3y;
@@ -714,13 +718,13 @@ _n_prog_new(c3_w byc_w, c3_w cal_w,
   pog_u->byc_u.ops_y = (c3_y*) _n_prog_dat(pog_u);
 
   pog_u->lit_u.len_w = lit_w;
-  pog_u->lit_u.non   = (u3_noun*) (pog_u->byc_u.ops_y + pog_u->byc_u.len_w);
+  pog_u->lit_u.non   = (u3_noun*) (pog_u->byc_u.ops_y + pog_u->byc_u.len_w + pad_w);
 
   pog_u->mem_u.len_w = mem_w;
-  pog_u->mem_u.sot_u = (u3n_memo*) (pog_u->lit_u.non + pog_u->lit_u.len_w);
+  pog_u->mem_u.sot_u = (u3n_memo*) (pog_u->lit_u.non + pog_u->lit_u.len_w + pod_w);
 
   pog_u->cal_u.len_w = cal_w;
-  pog_u->cal_u.sit_u = (u3j_site*) (pog_u->mem_u.sot_u + pog_u->mem_u.len_w);
+  pog_u->cal_u.sit_u = (u3j_site*) (pog_u->mem_u.sot_u + pog_u->mem_u.len_w + ped_w);
 
   pog_u->reg_u.len_w = reg_w;
   pog_u->reg_u.rit_u = (u3j_rite*) (pog_u->cal_u.sit_u + pog_u->cal_u.len_w);
@@ -738,7 +742,10 @@ _n_prog_old(u3n_prog* sep_u)
        reb_w = sizeof(u3j_rite) * sep_u->reg_u.len_w,
        lib_w = sizeof(u3_noun) * sep_u->lit_u.len_w,
        meb_w = sizeof(u3n_memo) * sep_u->mem_u.len_w,
-       dat_w = cab_w + reb_w + lib_w + meb_w;
+       pod_w = sep_u->lit_u.len_w % 2,
+       ped_w = sep_u->mem_u.len_w % 2,
+       dat_w = cab_w + reb_w + lib_w + meb_w +
+               (pod_w * sizeof(u3_noun)) + (ped_w * sizeof(u3n_memo));
 
   u3n_prog* pog_u     = u3a_malloc(sizeof(u3n_prog) + dat_w);
   pog_u->byc_u.own_o = c3n;
@@ -749,10 +756,10 @@ _n_prog_old(u3n_prog* sep_u)
   pog_u->lit_u.non   = (u3_noun*) _n_prog_dat(pog_u);
 
   pog_u->mem_u.len_w = sep_u->mem_u.len_w;
-  pog_u->mem_u.sot_u = (u3n_memo*) (pog_u->lit_u.non + pog_u->lit_u.len_w);
+  pog_u->mem_u.sot_u = (u3n_memo*) (pog_u->lit_u.non + pog_u->lit_u.len_w + pod_w);
 
   pog_u->cal_u.len_w = sep_u->cal_u.len_w;
-  pog_u->cal_u.sit_u = (u3j_site*) (pog_u->mem_u.sot_u + pog_u->mem_u.len_w);
+  pog_u->cal_u.sit_u = (u3j_site*) (pog_u->mem_u.sot_u + pog_u->mem_u.len_w + ped_w);
 
   pog_u->reg_u.len_w = sep_u->reg_u.len_w;
   pog_u->reg_u.rit_u = (u3j_rite*) (pog_u->cal_u.sit_u + pog_u->cal_u.len_w);
@@ -2036,7 +2043,7 @@ _n_kale(u3_noun a)
   return a;
 }
 
-typedef struct {
+typedef struct __attribute__((__packed__)) {
   u3n_prog* pog_u;
   c3_w     ip_w;
 } burnframe;
@@ -2888,12 +2895,13 @@ _cn_take_prog_cb(u3p(u3n_prog) pog_p)
   u3n_prog* gop_u;
 
   if ( c3y == pog_u->byc_u.own_o ) {
+    c3_w pad_w = (8 - pog_u->byc_u.len_w % 8) % 8;
     gop_u = _n_prog_new(pog_u->byc_u.len_w,
                         pog_u->cal_u.len_w,
                         pog_u->reg_u.len_w,
                         pog_u->lit_u.len_w,
                         pog_u->mem_u.len_w);
-    memcpy(gop_u->byc_u.ops_y, pog_u->byc_u.ops_y, pog_u->byc_u.len_w);
+    memcpy(gop_u->byc_u.ops_y, pog_u->byc_u.ops_y, pog_u->byc_u.len_w + pad_w);
   }
   else {
     gop_u = _n_prog_old(pog_u);
@@ -2988,11 +2996,14 @@ _n_ream(u3_noun kev)
   c3_w i_w;
   u3n_prog* pog_u = u3to(u3n_prog, u3t(kev));
 
+  c3_w pad_w = (8 - pog_u->byc_u.len_w % 8) % 8;
+  c3_w pod_w = pog_u->lit_u.len_w % 2;
+  c3_w ped_w = pog_u->mem_u.len_w % 2;
   // fix up pointers for loom portability
   pog_u->byc_u.ops_y = (c3_y*) _n_prog_dat(pog_u);
-  pog_u->lit_u.non   = (u3_noun*) (pog_u->byc_u.ops_y + pog_u->byc_u.len_w);
-  pog_u->mem_u.sot_u = (u3n_memo*) (pog_u->lit_u.non + pog_u->lit_u.len_w);
-  pog_u->cal_u.sit_u = (u3j_site*) (pog_u->mem_u.sot_u + pog_u->mem_u.len_w);
+  pog_u->lit_u.non   = (u3_noun*) (pog_u->byc_u.ops_y + pog_u->byc_u.len_w + pad_w);
+  pog_u->mem_u.sot_u = (u3n_memo*) (pog_u->lit_u.non + pog_u->lit_u.len_w + pod_w);
+  pog_u->cal_u.sit_u = (u3j_site*) (pog_u->mem_u.sot_u + pog_u->mem_u.len_w + ped_w);
   pog_u->reg_u.rit_u = (u3j_rite*) (pog_u->cal_u.sit_u + pog_u->cal_u.len_w);
 
   for ( i_w = 0; i_w < pog_u->cal_u.len_w; ++i_w ) {
diff --git a/pkg/noun/version.h b/pkg/noun/version.h
index 47e43ee336..9130d5f94e 100644
--- a/pkg/noun/version.h
+++ b/pkg/noun/version.h
@@ -9,7 +9,8 @@ typedef c3_w       u3v_version;
 #define U3V_VER1   1
 #define U3V_VER2   2
 #define U3V_VER3   3
-#define U3V_VERLAT U3V_VER3
+#define U3V_VER4   4
+#define U3V_VERLAT U3V_VER4
 
 /* PATCHES
  */