1 files changed, 1 insertions, 0 deletions
diff --git a/hash.cxx b/hash.cxx
index a10815c9..fb2f15c1 100644
--- a/hash.cxx
+++ b/hash.cxx
@@ -90,6 +90,7 @@ find_hash (systemtap_session& s, const string& script)
 
   // Hash kernel release and arch.
   h.add(s.kernel_release);
+  h.add(s.kernel_build_tree);
   h.add(s.architecture);
 
   // Hash user-specified arguments (that change the generated module).