--- a/src/i18n/locale/cmucl.pot
+++ b/src/i18n/locale/cmucl.pot
@@ -6065,8 +6065,9 @@ msgstr ""
 #: src/code/commandline.lisp
 msgid ""
 "Specifies the number of megabytes that should be allocated to the\n"
-"  heap.  If not specified, a platform-specific default is used.  The\n"
-"  actual maximum allowed heap size is platform-specific."
+"  heap.  If not specified, a platform-specific default is used.  If 0,\n"
+"  the platform-specific maximum heap size is used.  The actual maximum\n"
+"  allowed heap size is platform-specific."
 msgstr ""
 
 #: src/code/commandline.lisp
@@ -9171,9 +9172,12 @@ msgid ""
 "  The standard streams are sys::*stdin*, sys::*stdout*, and\n"
 "  sys::*stderr*, which are normally the input and/or output streams\n"
 "  for *standard-input* and *standard-output*.  Also sets sys::*tty*\n"
-"  (normally *terminal-io* to the given external format.  If the\n"
-"  optional argument Filenames is gvien, then the filename encoding is\n"
-"  set to the specified format."
+"  (normally *terminal-io* to the given external format.  The value of\n"
+"  *default-external-format* is not changed.\n"
+"\n"
+"  If the optional argument Filenames is given, then the filename\n"
+"  encoding is set to the specified format, if it has not already been\n"
+"  specified previously."
 msgstr ""
 
 #: src/code/extfmts.lisp