diff --git a/infra/base-images/base-builder/srcmap b/infra/base-images/base-builder/srcmap
index 62c5de4db..6ead9ada4 100755
--- a/infra/base-images/base-builder/srcmap
+++ b/infra/base-images/base-builder/srcmap
@@ -1,4 +1,4 @@
-#!/bin/bash -eux
+#!/bin/bash -eu
 # Copyright 2016 Google Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -52,5 +52,9 @@ for DOT_HG_DIR in $(find $SRC -name ".hg" -type d); do
   jq_inplace $SRCMAP ".\"$HG_DIR\" = { type: \"hg\", url: \"$HG_URL\", rev: \"$HG_REV\" }"
 done
 
+if [ "${OSSFUZZ_REVISION-0}" -ne "0" ]; then
+  jq_inplace $SRCMAP ".\"/src\" = { type: \"git\", url: \"https://github.com/google/oss-fuzz.git\", rev: \"$OSSFUZZ_REVISION\" }"
+fi
+
 cat $SRCMAP
 rm $SRCMAP