diff --git a/payload_signer.cc b/payload_signer.cc
index ef9791d..f613f36 100644
--- a/payload_signer.cc
+++ b/payload_signer.cc
@@ -5,6 +5,7 @@
 #include "update_engine/payload_signer.h"
 
 #include <base/logging.h>
+#include <base/string_split.h>
 #include <base/string_util.h>
 #include <openssl/pem.h>
 
@@ -146,9 +147,9 @@
   // This runs on the server, so it's okay to cop out and call openssl
   // executable rather than properly use the library
   vector<string> cmd;
-  SplitString("/usr/bin/openssl rsautl -raw -sign -inkey x -in x -out x",
-              ' ',
-              &cmd);
+  base::SplitString("/usr/bin/openssl rsautl -raw -sign -inkey x -in x -out x",
+                    ' ',
+                    &cmd);
   cmd[cmd.size() - 5] = private_key_path;
   cmd[cmd.size() - 3] = hash_path;
   cmd[cmd.size() - 1] = sig_path;