diff --git a/NEWS b/NEWS
index e769199d..b4ae64a6 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,12 @@ GNU Bison NEWS
 
 * Noteworthy changes in release ?.? (????-??-??) [?]
 
+** Bug fixes
+
+  Portability issues and minor cosmetic issues.
+
+  The lalr1.cc skeleton properly rejects unsupported values for parse.lac
+  (as yacc.c does).
 
 * Noteworthy changes in release 3.5.1 (2020-01-19) [stable]
 
diff --git a/src/parse-gram.c b/src/parse-gram.c
index fa60271f..ccabb4b5 100644
--- a/src/parse-gram.c
+++ b/src/parse-gram.c
@@ -1,4 +1,4 @@
-/* A Bison parser, made by GNU Bison 3.5.22-948cd-dirty.  */
+/* A Bison parser, made by GNU Bison 3.5.2.  */
 
 /* Bison implementation for Yacc-like parsers in C
 
@@ -48,7 +48,7 @@
 #define YYBISON 1
 
 /* Bison version.  */
-#define YYBISON_VERSION "3.5.22-948cd-dirty"
+#define YYBISON_VERSION "3.5.2"
 
 /* Skeleton name.  */
 #define YYSKELETON_NAME "yacc.c"
diff --git a/src/parse-gram.h b/src/parse-gram.h
index c9209ef1..ab38f6d9 100644
--- a/src/parse-gram.h
+++ b/src/parse-gram.h
@@ -1,4 +1,4 @@
-/* A Bison parser, made by GNU Bison 3.5.22-948cd-dirty.  */
+/* A Bison parser, made by GNU Bison 3.5.2.  */
 
 /* Bison interface for Yacc-like parsers in C