diff --git a/docs/core/configuration.md b/docs/core/configuration.md
index 4084cb974..b72fdcc81 100644
--- a/docs/core/configuration.md
+++ b/docs/core/configuration.md
@@ -12,6 +12,7 @@ const config = {
   absTol: 1e-15,
   matrix: 'Matrix',
   number: 'number',
+  numberFallback: 'number',
   precision: 64,
   predictable: false,
   randomSeed: null