diff --git a/tools/compiledump.py b/tools/compiledump.py
index fb3b901..dbb4a18 100755
--- a/tools/compiledump.py
+++ b/tools/compiledump.py
@@ -52,6 +52,9 @@
     help='Path to an R8 jar.',
     default=None)
   parser.add_argument(
+    '--r8-flags', '--r8_flags',
+    help='Additional option(s) for the compiler.')
+  parser.add_argument(
     '-override',
     help='Do not override any extracted dump in temp-dir',
     default=False,
@@ -341,6 +344,8 @@
       cmd.append('-Dcom.android.tools.r8.enableTestAssertions=1')
     if args.print_times:
       cmd.append('-Dcom.android.tools.r8.printtimes=1')
+    if args.r8_flags:
+      cmd.extend(args.r8_flags.split(' '))
     if hasattr(args, 'properties'):
       cmd.extend(args.properties);
     cmd.extend(determine_properties(build_properties))