diff --git a/INSTALLATION.md b/INSTALLATION.md
index c8ee0a1..9d5bf55 100644
--- a/INSTALLATION.md
+++ b/INSTALLATION.md
@@ -2,7 +2,7 @@ INSTALLATION
 ============
 Install `hh` using [distribution](#distribution-installation), 
 from [source code](#installation-from-source-code), on [Ubuntu](#ubuntu),
-[Fedora/RHEL/CentOS](#fedorarhelcentos), [Debian/Mint](#debianmint),
+[Fedora/RHEL/CentOS/ScientificLinux](#fedorarhelcentos), [Debian/Mint](#debianmint),
 [Arch Linux](#arch-linux) or [Mac OS](#mac-os).
 
 
diff --git a/README.md b/README.md
index 7c3ace7..a439fdd 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,7 @@ Install HSTR:
 * [Debian](INSTALLATION.md#debianmint)
 * [Mint](INSTALLATION.md#debianmint)
 * [Arch Linux](INSTALLATION.md#arch-linux)
+* [Scientific Linux](#fedorarhelcentos)
 * [Mac OS](INSTALLATION.md#mac-os)
 
 
diff --git a/src/hstr.c b/src/hstr.c
index f33c624..bb7f3a7 100644
--- a/src/hstr.c
+++ b/src/hstr.c
@@ -201,7 +201,7 @@ static const char *HELP_STRING=
         "\n";
 
 static const char *VERSION_STRING=
-        "hh version \"1.17\""
+        "hh version \"1.18\""
         "\n   build   \""__DATE__" " __TIME__"\""
         "\n";
 
@@ -1196,7 +1196,6 @@ void hstr_getopt(int argc, char **argv, Hstr *hstr)
 
         case '?':
         default:
-            printf("Unrecognized option: '%s'", HELP_STRING);
             printf("%s", HELP_STRING);
             exit(EXIT_SUCCESS);
         }