diff --git a/src/calibre/debug.py b/src/calibre/debug.py
index 893dab07b6..98143e58b4 100644
--- a/src/calibre/debug.py
+++ b/src/calibre/debug.py
@@ -155,7 +155,7 @@ def print_basic_debug_info(out=None):
     from calibre.constants import (__appname__, get_version, isportable, isosx,
                                    isfrozen, is64bit)
     out(__appname__, get_version(), 'Portable' if isportable else '',
-        'isfrozen:', isfrozen, 'is64bit:', is64bit)
+        'embedded-python:', isfrozen, 'is64bit:', is64bit)
     out(platform.platform(), platform.system(), platform.architecture())
     if iswindows and not is64bit:
         try:
diff --git a/src/calibre/gui2/dialogs/message_box.py b/src/calibre/gui2/dialogs/message_box.py
index d0a457ad7d..7f6b62f666 100644
--- a/src/calibre/gui2/dialogs/message_box.py
+++ b/src/calibre/gui2/dialogs/message_box.py
@@ -376,7 +376,7 @@ class JobError(QDialog):  # {{{
         d = QTextDocument()
         d.setHtml(self.msg_label.text())
         QApplication.clipboard().setText(
-                u'calibre, version %s (%s, isfrozen: %s)\n%s: %s\n\n%s' %
+                u'calibre, version %s (%s, embedded-python: %s)\n%s: %s\n\n%s' %
                 (__version__, sys.platform, isfrozen,
                     unicode(self.windowTitle()), unicode(d.toPlainText()),
                     unicode(self.det_msg.toPlainText())))