diff --git a/tools/configure.py b/tools/configure.py
index 467a22110e..16787ab167 100644
--- a/tools/configure.py
+++ b/tools/configure.py
@@ -460,6 +460,7 @@ def default_from_script_path(optname, orig, alternatives):
         'duk_heap_refcount.c',
         'duk_heap_stringcache.c',
         'duk_heap_stringtable.c',
+        'duk_heap_slotcache.c',
         'duk_hnatfunc.h',
         'duk_hobject_alloc.c',
         'duk_hobject_class.c',
diff --git a/util/dist.py b/util/dist.py
index 9ad40ea3d7..039886a337 100644
--- a/util/dist.py
+++ b/util/dist.py
@@ -372,6 +372,7 @@ def main():
         'duk_heap_refcount.c',
         'duk_heap_stringcache.c',
         'duk_heap_stringtable.c',
+        'duk_heap_slotcache.c',
         'duk_henv.h',
         'duk_hnatfunc.h',
         'duk_hobject_alloc.c',