diff -Nur apt-0.5.4/apt-pkg/deb/dpkgpm.cc apt-0.5.4.flo/apt-pkg/deb/dpkgpm.cc
--- apt-0.5.4/apt-pkg/deb/dpkgpm.cc	2001-05-27 04:42:19.000000000 +0000
+++ apt-0.5.4.flo/apt-pkg/deb/dpkgpm.cc	2003-05-07 00:51:35.000000000 +0000
@@ -452,7 +452,8 @@
 	 if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
 	    _exit(100);
 	 
-	 if (_config->FindB("DPkg::FlushSTDIN",true) == true)
+	 if (_config->FindB("DPkg::FlushSTDIN",true) == true &&
+		isatty(STDIN_FILENO))
 	 {
 	    int Flags,dummy;
 	    if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)