1 files changed, 3 insertions, 1 deletions
diff --git a/lib/logger.rb b/lib/logger.rb
index 8be1c26664..f572921db4 100644
--- a/lib/logger.rb
+++ b/lib/logger.rb
@@ -457,7 +457,9 @@ class Logger
     if @logdev.nil? or severity < @level
       return true
     end
-    progname ||= @progname
+    if progname.nil?
+      progname = @progname
+    end
     if message.nil?
       if block_given?
         message = yield