diff --git a/lib/calib_yacc.y b/lib/calib_yacc.y
index c2f1673..c017e63 100644
--- a/lib/calib_yacc.y
+++ b/lib/calib_yacc.y
@@ -247,7 +247,7 @@ extern comedi_calibration_t* _comedi_parse_calibration_file( const char *cal_fil
 		| error
 			{
 				fprintf(stderr, "input error on line %i\n", @1.first_line );
-				return -1;
+				YYABORT;
 			}
 		;