diff --git a/debian/changelog b/debian/changelog
index 5244930..98bb4a6 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -2,6 +2,8 @@ ubuntu-dev-tools (0.140) UNRELEASED; urgency=low
 
   * Bump Standards-Version to 3.9.3, no changes needed.
   * Update machine-readable copyright Format to 1.0.
+  * pbuilder-dist: Use the same chroot, whether the system-architecture was
+    the supplied architecture or was chosen by default (LP: #943435)
 
  -- Stefano Rivera <stefanor@debian.org>  Sat, 25 Feb 2012 16:09:53 +0200
 
diff --git a/pbuilder-dist b/pbuilder-dist
index 137c7f7..acf0578 100755
--- a/pbuilder-dist
+++ b/pbuilder-dist
@@ -187,8 +187,10 @@ class PbuilderDist:
         and return it as a string.
         """
         if not self.build_architecture:
-            self.chroot_string = self.target_distro
             self.build_architecture = self.system_architecture
+
+        if self.build_architecture == self.system_architecture:
+            self.chroot_string = self.target_distro
         else:
             self.chroot_string = (self.target_distro + '-'
                                   + self.build_architecture)