diff --git a/binutils/arlex.l b/binutils/arlex.l
index a43a6214b3d..145b9e16773 100644
--- a/binutils/arlex.l
+++ b/binutils/arlex.l
@@ -78,7 +78,7 @@ int linenumber;
 "("             { return '('; }
 ")"             { return ')'; }
 ","             { return ','; }
-[A-Za-z0-9/\\$:.\-\_]+  {
+[A-Za-z0-9/\\$:.\-\_\+]+  {
 		yylval.name =  xstrdup (yytext);
 		return FILENAME;
 		}