diff --git a/tools/java-event-log-tags.py b/tools/java-event-log-tags.py
index c63fa2077..846d9cfd5 100755
--- a/tools/java-event-log-tags.py
+++ b/tools/java-event-log-tags.py
@@ -26,6 +26,7 @@ tags in the given input file.
 import cStringIO
 import getopt
 import os
+import os.path
 import re
 import sys
 
@@ -144,4 +145,8 @@ for t in tagfile.tags:
 
 buffer.write("}\n");
 
+output_dir = os.path.dirname(output_file)
+if not os.path.exists(output_dir):
+  os.makedirs(output_dir)
+
 event_log_tags.WriteOutput(output_file, buffer)