1 files changed, 2 insertions, 0 deletions
diff --git a/lexer.l b/lexer.l
index 607f591..7c5f5e7 100644
--- a/lexer.l
+++ b/lexer.l
@@ -24,7 +24,9 @@
 #include "parser_yacc.h"
 
 int lexerget_lineno(void);
+#ifdef __GNUC__
 static void yyunput(int, char*) __attribute__((unused));
+#endif
 extern const char *parser_input_buffer;
 
 #define YY_INPUT(buf,result,max_size) {   \