diff --git a/lib/string.fs b/lib/string.fs
new file mode 100644
index 0000000..3fc1918
--- /dev/null
+++ b/lib/string.fs
@@ -0,0 +1,24 @@
+\ planckforth -
+\ Copyright (C) 2021 nineties
+
+( === String === )
+
+." HELLO " cr
+private{
+
+\ Heap-allocated string object
+\ p: null terminated string
+: make-string ( p -- str )
+    dup strlen 1 + allocate throw tuck strcpy .s
+; export
+
+: release-string ( str -- ) free ; export
+
+}private
+
+T{ s" AAAAA" make-string constant A -> }T
+T{ s" BBBBBBB" make-string constant B -> }T
+T{ A s" AAAAA" streq -> true }T
+T{ B s" BBBBBBB" streq -> true }T
+T{ A release-string -> }T
+T{ B release-string -> }T
diff --git a/lib/table.fs b/lib/table.fs
index 8d1d1a6..9291e2b 100644
--- a/lib/table.fs
+++ b/lib/table.fs
@@ -220,8 +220,14 @@ T{ A table-values cdr cdr car -> 3 }T
 T{ A release-table -> }T
 
 T{ make-string-table constant A -> }T
-T{ 0 s" zero" A table! -> }T
-T{ 1 s" one" A table! -> }T
+T{ s" zero" make-string constant ZERO -> }T
+T{ s" one" make-string constant ONE -> }T
+T{ 0 ZERO A table! -> }T
+T{ 1 ONE A table! -> }T
+T{ ZERO A table@ -> 0 }T
+T{ ONE A table@ -> 1 }T
 T{ s" zero" A table@ -> 0 }T
 T{ s" one" A table@ -> 1 }T
 T{ A release-table -> }T
+T{ ZERO release-string -> }T
+T{ ONE release-string -> }T
diff --git a/runtests.fs b/runtests.fs
index 064c208..addc706 100644
--- a/runtests.fs
+++ b/runtests.fs
@@ -13,6 +13,7 @@ include test/utilities.fs
 include test/coreexttest.fs
 
 include test/export.fs
+include lib/string.fs
 include lib/array.fs
 include lib/bitscan.fs
 include lib/table.fs