diff --git a/ChangeLog b/ChangeLog
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@@ -1,5 +1,9 @@
 2002-10-18  Paul Eggert  <eggert@twinsun.com>
 
+	* data/glr.c (yyreportParseError): Don't assume that sprintf
+	yields the length of the printed string, as this is not true
+	on SunOS 4.1.4.  Reported by Peter Klein.
+
 	* tests/calc.at (_AT_DATA_CALC_Y): #undef memcmp and realloc.
 	* tests/conflicts.at (%nonassoc and eof): Likewise.
 	Fixes SunOS 4.1.4 test failure reported by Peter Klein.