diff --git a/libs/ardour/filename_extensions.cc b/libs/ardour/filename_extensions.cc
index 352e830000..a0de5ec280 100644
--- a/libs/ardour/filename_extensions.cc
+++ b/libs/ardour/filename_extensions.cc
@@ -24,7 +24,7 @@
 namespace ARDOUR {
 
 const char* const template_suffix = X_(".template");
-const char* const statefile_suffix = X_(".ardour");
+const char* const statefile_suffix = X_("." PROGRAM_NAME_LOWER_CASE);
 const char* const pending_suffix = X_(".pending");
 const char* const peakfile_suffix = X_(".peak");
 const char* const backup_suffix = X_(".bak");