Fixed minor typo in error message

1 files changed, 1 insertions, 1 deletions

diff --git a/scanopt.c b/scanopt.c
index 9702ded..3ca5f63 100644
--- a/scanopt.c
+++ b/scanopt.c
@@ -513,7 +513,7 @@ scanopt_err(s,opt_offset,is_short,err)
             fprintf(stderr,"option `%s' doesn't allow an argument\n",optname);
             break;
         case SCANOPT_ERR_ARG_NOT_FOUND:
-            fprintf(stderr,"option `%s' requires an an argument\n",optname);
+            fprintf(stderr,"option `%s' requires an argument\n",optname);
             break;
         case SCANOPT_ERR_OPT_AMBIGUOUS:
             fprintf(stderr,"option `%s' is ambiguous\n",optname);