2 files changed, 8 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 8714e7bc..b3ecc3a1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2014-06-05  Kaz Kylheku  <kaz@kylheku.com>
 
+	* parser.l (yylex_destroy): Only rely on the FLEX_ version
+	numbers if they are defined. In a newer flex, they are prefixed
+	by YY_.
+
+2014-06-05  Kaz Kylheku  <kaz@kylheku.com>
+
 	* configure (lang_flags): Removing -D_BSD_SOURCE
 	from lang_flags. Adding a test for determining
 	which flag reveals BSD functions. This is due to the
diff --git a/parser.l b/parser.l
index 1fa7ac38..a49e43d5 100644
--- a/parser.l
+++ b/parser.l
@@ -71,6 +71,7 @@ val form_to_ln_hash;
 
 static val prepared_error_message;
 
+#ifdef FLEX_MAJOR_VERSION
 #define FLEX_NUM_VERSION 1000*FLEX_MAJOR_VERSION + \
                          100*FLEX_MINOR_VERSION + \
                          FLEX_SUBMINOR_VERSION
@@ -81,6 +82,7 @@ int yylex_destroy(void)
   return 0;
 }
 #endif
+#endif
 
 void yyerror(const char *s)
 {