diff --git a/lib2/core/hashtable.lsts b/lib2/core/hashtable.lsts
index b54f34a40..5c3f25fc2 100644
--- a/lib2/core/hashtable.lsts
+++ b/lib2/core/hashtable.lsts
@@ -83,15 +83,15 @@ let .length(h: Hashtable<k,v>): USize = (
 # Reallocates the hashtable with a new capacity, rehashing all existing entries.
 # Used internally when the hashtable needs to grow.
 let .realloc(h: Hashtable<k,v>, target-capacity: USize): Hashtable<k,v> = (
-   let new-data = mk-sparse-owned-data(type((HashtableRowExists,k,v)), target-capacity);
+   let new-data = Hashtable(mk-sparse-owned-data(type((HashtableRowExists,k,v)), target-capacity));
    let old-i = 0_sz;
    while old-i < h.data.capacity {
       let old-kv = h.data[old-i];
       if is(old-kv.first,HashtableRowFilled)
-      then new-data[old-i] = h.data[old-i];
+      then new-data.bind-direct(old-kv.second, old-kv.third);
       old-i = old-i + 1;
    };
-   Hashtable(new-data)
+   new-data
 );
 
 # new allocations = 1 if realloc is necessary
diff --git a/tests/promises/hashtable/comparison.lsts b/tests/promises/hashtable/comparison.lsts
index d3dcbe40e..7ed21c9ef 100644
--- a/tests/promises/hashtable/comparison.lsts
+++ b/tests/promises/hashtable/comparison.lsts
@@ -25,3 +25,9 @@ assert( safe-alloc-block-count == 0 );
 assert( {"1":"2"}.lookup("1","3") == "2" );
 assert( {"1":"2"}.lookup("2","3") == "3" );
 assert( safe-alloc-block-count == 0 );
+
+assert( {"1":"2"}["1"] == {"1":"2","2":"3","3":"4","4":"5","5":"6","6":"7","7":"8","8":"9","9":"10","10":"11","11":"12","12":"13","13":"14","14":"15","15":"16","16":"17","17":"18",
+                     "18":"19","19":"20","20":"21","21":"22","22":"23"}["1"] );
+assert( {"1":"2","2":"3","3":"4","4":"5","5":"6","6":"7","7":"8","8":"9","9":"10","10":"11","11":"12","12":"13","13":"14","14":"15","15":"16","16":"17","17":"18",
+         "18":"19","19":"20","20":"21","21":"22","22":"23","23":"24","24":"25","25":"26","26":"27","27":"28","28":"29","29":"30","30":"31","31":"32","32":"33"}["11"] == Some("12") );
+assert( safe-alloc-block-count == 0 );
diff --git a/tests/promises/hashtable/realloc.lsts b/tests/promises/hashtable/realloc.lsts
new file mode 100644
index 000000000..f722e8808
--- /dev/null
+++ b/tests/promises/hashtable/realloc.lsts
@@ -0,0 +1,16 @@
+
+import lib/std/minimal.lsts;
+
+let table = mk-hashtable(type(String), type(U64));
+
+let ti = 0_u64;
+while ti < 5000 {
+   table = table.bind("\{ti}", ti);
+   ti = ti + 1;
+};
+
+ti = 0_u64;
+while ti < 5000 {
+   assert(table.lookup("\{ti}", 0_u64) == ti);
+   ti = ti + 1;
+};