diff --git a/ansi-tests/expt.lsp b/ansi-tests/expt.lsp
index dd43daba7cac306e664a24325ed3ae927c8db1d2..8546ecd187fe9a5f121b0dca007fb33f7b197f83 100644
--- a/ansi-tests/expt.lsp
+++ b/ansi-tests/expt.lsp
@@ -48,7 +48,7 @@
   t)
 
 (deftest expt.error.11
-  (signals-error (expt most-positive-long-float 2) floating-point-underflow)
+  (signals-error (expt least-positive-long-float 2) floating-point-underflow)
   t)