diff --git a/src/core/asm.c b/src/core/asm.c
index 593365f3..050aae26 100644
--- a/src/core/asm.c
+++ b/src/core/asm.c
@@ -541,6 +541,10 @@ static JanetAssembleResult janet_asm1(JanetAssembler *parent, Janet source, int
     x = janet_get(s, janet_csymbolv("vararg"));
     if (janet_truthy(x)) def->flags |= JANET_FUNCDEF_FLAG_VARARG;
 
+    /* Check strict arity */
+    x = janet_get(s, janet_csymbolv("fix-arity"));
+    if (janet_truthy(x)) def->flags |= JANET_FUNCDEF_FLAG_FIXARITY;
+
     /* Check source */
     x = janet_get(s, janet_csymbolv("source"));
     if (janet_checktype(x, JANET_STRING)) def->source = janet_unwrap_string(x);
@@ -836,6 +840,9 @@ Janet janet_disasm(JanetFuncDef *def) {
     if (def->flags & JANET_FUNCDEF_FLAG_VARARG) {
         janet_table_put(ret, janet_csymbolv("vararg"), janet_wrap_true());
     }
+    if (def->flags & JANET_FUNCDEF_FLAG_FIXARITY) {
+        janet_table_put(ret, janet_csymbolv("fix-arity"), janet_wrap_true());
+    }
     if (NULL != def->name) {
         janet_table_put(ret, janet_csymbolv("name"), janet_wrap_string(def->name));
     }
diff --git a/src/core/string.c b/src/core/string.c
index e5fa6f90..a299d78e 100644
--- a/src/core/string.c
+++ b/src/core/string.c
@@ -518,7 +518,7 @@ static void janet_pretty_one(struct pretty *S, Janet x) {
     switch (janet_type(x)) {
         default:
             janet_description_b(S->buffer, x);
-            return;
+            break;
         case JANET_ARRAY:
         case JANET_TUPLE:
             {
@@ -579,6 +579,8 @@ static void janet_pretty_one(struct pretty *S, Janet x) {
                 break;
             }
     }
+    /* Remove from seen */
+    janet_table_remove(&S->seen, x);
     return;
 }
 
diff --git a/src/include/janet/janet.h b/src/include/janet/janet.h
index 7307001a..29ed4384 100644
--- a/src/include/janet/janet.h
+++ b/src/include/janet/janet.h
@@ -1094,6 +1094,7 @@ JANET_API int janet_equals(Janet x, Janet y);
 JANET_API int32_t janet_hash(Janet x);
 JANET_API int janet_compare(Janet x, Janet y);
 JANET_API int janet_cstrcmp(const uint8_t *str, const char *other);
+JANET_API JanetBuffer *janet_pretty(JanetBuffer *buffer, int depth, Janet x);
 
 /* VM functions */
 JANET_API int janet_init(void);