diff --git a/ChangeLog b/ChangeLog
index 0d36679ae..b815fa6fa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 2000-09-25  Bart Schaefer  <schaefer@zsh.org>
 
 	* 12862: Src/exec.c: Fix STTY parameter to match documentation.
+	(Plus unposted addition at the end of execcmd() to clear STTYval.)
 
 2000-09-22  Clint Adams  <schizo@debian.org>
 
diff --git a/Src/exec.c b/Src/exec.c
index 8ac66ede7..4a8aab335 100644
--- a/Src/exec.c
+++ b/Src/exec.c
@@ -2363,6 +2363,9 @@ execcmd(Estate state, int input, int output, int how, int last1)
 	xtrerr = oxtrerr;
 	zclose(fil);
     }
+
+    zsfree(STTYval);
+    STTYval = 0;
 }
 
 /* Arrange to have variables restored. */