X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Ffd-stream.lisp;h=753012881470e66e50042b9d7a57e03c82e8b3ce;hb=15d6e7c9a2c3234f95dfe278046fa2fee1b0c007;hp=d8a2d5799d90e36d7c54a022c9e796c0dd95d90d;hpb=96a1badea2523bf188f7ba023e2f69a6785847d6;p=sbcl.git

diff --git a/src/code/fd-stream.lisp b/src/code/fd-stream.lisp
index d8a2d57..7530128 100644
--- a/src/code/fd-stream.lisp
+++ b/src/code/fd-stream.lisp
@@ -671,7 +671,9 @@
 			  do (setf result
 				   (+ (* 256 result)
 				      (sap-ref-8 sap (+ head j))))
-			  finally (return (dpb result (byte i 0) -1))))))
+			  finally (return (if (logbitp (1- i) result)
+                                              (dpb result (byte i 0) -1)
+                                              result))))))
 	      `(signed-byte ,i)
 	      (/ i 8)))))