diff --git a/parse.yacc b/parse.yacc
index 719a4d7b5..1bef965e5 100644
--- a/parse.yacc
+++ b/parse.yacc
@@ -197,7 +197,7 @@ void
 yyerror(s)
     char *s;
 {
-    /* Save the line the first error occured on. */
+    /* Save the line the first error occurred on. */
     if (errorlineno == -1)
 	errorlineno = sudolineno ? sudolineno - 1 : 0;
     if (s && !quiet) {