diff --git a/src/core/asm.c b/src/core/asm.c
index be596e81..b182cbfc 100644
--- a/src/core/asm.c
+++ b/src/core/asm.c
@@ -721,6 +721,46 @@ static JanetAssembleResult janet_asm1(JanetAssembler *parent, Janet source, int
         }
     }
 
+    /* Set symbolslots */
+    def->symbolslots = NULL;
+    def->symbolslots_length = 0;
+
+    x = janet_get1(s, janet_ckeywordv("symbolslots"));
+    if (janet_indexed_view(x, &arr, &count)) {
+        def->symbolslots_length = count;
+        def->symbolslots = janet_malloc(sizeof(JanetSymbolSlot) * (size_t) count);
+        if (NULL == def->symbolslots) {
+            JANET_OUT_OF_MEMORY;
+        }
+        for (i = 0; i < count; i++) {
+            const Janet *tup;
+            Janet entry = arr[i];
+            JanetSymbolSlot ss;
+            if (!janet_checktype(entry, JANET_TUPLE)) {
+                janet_asm_error(&a, "expected tuple");
+            }
+            tup = janet_unwrap_tuple(entry);
+            if (!janet_checkint(tup[0])) {
+                janet_asm_error(&a, "expected integer");
+            }
+            if (!janet_checkint(tup[1])) {
+                janet_asm_error(&a, "expected integer");
+            }
+            if (!janet_checkint(tup[2])) {
+                janet_asm_error(&a, "expected integer");
+            }
+            if (!janet_checktype(tup[3], JANET_STRING)) {
+                janet_asm_error(&a, "expected string");
+            }
+            ss.birth_pc = janet_unwrap_integer(tup[0]);
+            ss.death_pc = janet_unwrap_integer(tup[1]);
+            ss.slot_index = janet_unwrap_integer(tup[2]);
+            ss.symbol = janet_unwrap_string(tup[3]);
+
+            def->symbolslots[i] = ss;
+        }
+    }
+
     /* Set environments */
     def->environments = janet_realloc(def->environments, def->environments_length * sizeof(int32_t));
     x = janet_get1(s, janet_ckeywordv("environments"));
diff --git a/src/core/compile.c b/src/core/compile.c
index cff26a91..e41fa5bf 100644
--- a/src/core/compile.c
+++ b/src/core/compile.c
@@ -998,8 +998,8 @@ static void janetc_init(JanetCompiler *c, JanetTable *env, const uint8_t *where,
 static void janetc_deinit(JanetCompiler *c) {
     janet_v_free(c->buffer);
     janet_v_free(c->mapbuffer);
-    c->env = NULL;
     janet_v_free(c->local_symbols);
+    c->env = NULL;
 }
 
 /* Compile a form. */
diff --git a/test/suite0015.janet b/test/suite0015.janet
index 62a0dad7..e407a78c 100644
--- a/test/suite0015.janet
+++ b/test/suite0015.janet
@@ -12,15 +12,19 @@
   "symbolslots when *debug* is true")
 (setdyn *debug* false)
 
-# need to fix assembling functions
-(comment
-  (setdyn *debug* true)
-  (def f (asm (disasm (fn [x] (fn [y] (+ x y))))))
-  (assert (deep= (in (disasm f) :symbolslots)
-                @[[0 2147483647 0 "a"] [1 2147483647 1 "x"]])
-    "symbolslots survive disasm/asm")
-  (setdyn *debug* false)
-  )
+(setdyn *debug* true)
+(defn a [arg]
+    (def x 10)
+    (do
+      (def y 20)
+      (def z 30)
+      (+ x y z)))
+(def symbolslots (in (disasm a) :symbolslots))
+(def f (asm (disasm a)))
+(assert (deep= (in (disasm f) :symbolslots)
+                symbolslots)
+  "symbolslots survive disasm/asm")
+(setdyn *debug* false)
 
 (setdyn *debug* true)
 (assert (deep= (in (disasm (defn a [arg]