diff --git a/tools/compiledump.py b/tools/compiledump.py
index 66a2152..c819865 100755
--- a/tools/compiledump.py
+++ b/tools/compiledump.py
@@ -789,6 +789,7 @@
 
 
 def run(args, otherargs):
+    gradle.EnsureJdk()
     if args.summary:
         summarize_dump_files(otherargs)
     elif args.loop: