diff --git a/infra/gcb/build_project.py b/infra/gcb/build_project.py
index fb80dc906..c000f269f 100755
--- a/infra/gcb/build_project.py
+++ b/infra/gcb/build_project.py
@@ -166,6 +166,15 @@ def get_build_steps(project_dir):
           ],
           'dir': 'oss-fuzz/projects/' + name,
       },
+      {
+          'name':
+              image,
+          'args': [
+              'bash', '-c',
+              'srcmap > /workspace/srcmap.json && cat /workspace/srcmap.json'
+          ],
+          'env': ['OSSFUZZ_REVISION=$REVISION_ID'],
+      },
       {
           'name': 'gcr.io/oss-fuzz-base/msan-builder',
           'args': [
@@ -186,9 +195,12 @@ def get_build_steps(project_dir):
       out = '/workspace/out/' + sanitizer
       stamped_name = name + '-' + sanitizer + '-' + ts
       zip_file = stamped_name + '.zip'
+      stamped_srcmap_file = stamped_name + '.srcmap.json'
       bucket = ENGINE_INFO[fuzzing_engine].upload_bucket
       upload_url = get_signed_url(UPLOAD_URL_FORMAT.format(bucket, name, 
                                                            zip_file))
+      srcmap_url = get_signed_url(UPLOAD_URL_FORMAT.format(bucket, name,
+                                                           stamped_srcmap_file))
       targets_list_filename = get_targets_list_filename(sanitizer)
       targets_list_url = get_signed_url(
           get_targets_list_url(bucket, name, sanitizer))
@@ -263,6 +275,14 @@ def get_build_steps(project_dir):
                   'bash', '-c', 'cd {0} && zip -r {1} *'.format(out, zip_file)
               ],
           },
+          # upload srcmap
+          {
+              'name': 'gcr.io/oss-fuzz-base/uploader',
+              'args': [
+                  '/workspace/srcmap.json',
+                  srcmap_url,
+              ],
+          },
           # upload binaries
           {
               'name': 'gcr.io/oss-fuzz-base/uploader',