diff --git tools/cef_version.py tools/cef_version.py
index 132438ba..6972680a 100644
--- tools/cef_version.py
+++ tools/cef_version.py
@@ -92,6 +92,10 @@ class VersionFormatter:
       self._branch_version = {'MINOR': minor, 'PATCH': bugfix}
     return self._branch_version
 
+  def get_piper_cl(self):
+    """ Returns the Piper CL. """
+    return os.getenv('CEF_PIPER_CL', '0')
+
   def get_chromium_version_string(self):
     """ Returns the Chromium version number string. """
     chrome_version = self.get_chrome_version_components()
@@ -170,6 +174,7 @@ class VersionFormatter:
     chrome_version = self.get_chrome_version_components()
     chrome_major = chrome_version['MAJOR']
     chrome_version_part = 'chromium-' + self.get_chromium_version_string()
+    piper_cl_part = 'piper-' + self.get_piper_cl()
 
     cef_commit = self.get_cef_commit_components()
     cef_commit_hash = self._format_commit_hash(cef_commit['HASH'])
@@ -187,9 +192,9 @@ class VersionFormatter:
       cef_branch_name = git.get_branch_name(self.cef_path).split('/')[-1]
 
       self._version_parts = {'MAJOR': int(chrome_major), 'MINOR': 0, 'PATCH': 0}
-      self._version_string = '%s.0.0-%s.%s+%s+%s' % \
+      self._version_string = '%s.0.0-%s.%s+%s+%s+%s' % \
              (chrome_major, cef_branch_name, cef_commit['NUMBER'],
-              cef_commit_hash, chrome_version_part)
+              cef_commit_hash, chrome_version_part, piper_cl_part)
     else:
       cef_branch = self.get_cef_branch_version_components()
 
@@ -198,9 +203,9 @@ class VersionFormatter:
           'MINOR': cef_branch['MINOR'],
           'PATCH': cef_branch['PATCH']
       }
-      self._version_string = '%s.%d.%d+%s+%s' % \
+      self._version_string = '%s.%d.%d+%s+%s+%s' % \
              (chrome_major, cef_branch['MINOR'], cef_branch['PATCH'],
-              cef_commit_hash, chrome_version_part)
+              cef_commit_hash, chrome_version_part, piper_cl_part)
 
   def _get_version_string(self):
     self._compute_version()
diff --git tools/make_version_header.py tools/make_version_header.py
index fa2325aa..a7ee5a43 100644
--- tools/make_version_header.py
+++ tools/make_version_header.py
@@ -31,6 +31,7 @@ def make_version_header(header):
 #define CEF_VERSION_PATCH $VERSION_PATCH$
 #define CEF_COMMIT_NUMBER $COMMIT_NUMBER$
 #define CEF_COMMIT_HASH "$COMMIT_HASH$"
+#define CEF_PIPER_CL $PIPER_CL$
 #define COPYRIGHT_YEAR $YEAR$
 
 #define CHROME_VERSION_MAJOR $CHROME_MAJOR$
@@ -76,6 +77,7 @@ CEF_EXPORT int cef_version_info(int entry);
   # Substitute hash values for placeholders.
   result = result.replace('$YEAR$', get_year())
   result = result.replace('$VERSION$', formatter.get_version_string())
+  result = result.replace('$PIPER_CL$', formatter.get_piper_cl())
 
   commit_components = formatter.get_cef_commit_components()
   for key in ('HASH', 'NUMBER'):