diff --git a/Linux_Exploit_Suggester.pl b/Linux_Exploit_Suggester.pl
index 3124d2a..f220b9e 100755
--- a/Linux_Exploit_Suggester.pl
+++ b/Linux_Exploit_Suggester.pl
@@ -60,7 +60,7 @@ sub get_kernel {
 
     # partial kernels might be provided by the user,
     # such as '2.4' or '2.6.'
-    my $is_partial = $khost =~ /^\d+\.\d+\.?\d?/ ? 0 : 1;
+    my $is_partial = $khost =~ /^\d+\.\d+\.\d+/ ? 0 : 1;
     if ( $is_partial and substr($khost,-1) ne '.' ) {
         $khost .= '.';
     }