diff --git a/Changes b/Changes
index 4111188..3c6139c 100644
--- a/Changes
+++ b/Changes
@@ -35,6 +35,7 @@ N.N.N  - DD-MMM-2015
 - Fixed to show the memory usage correctly in 'phpapc.pm'.
 - Fixed in 'zfs.pm' to convert FRAG to a numeric value if it's not used in the
   pool. [#138]
+- Fixed a possible uninitialized value in 'HTTPServer.pm' at line 37.
 
 
 3.8.1  - 13-Nov-2015
diff --git a/lib/HTTPServer.pm b/lib/HTTPServer.pm
index 103545e..42d830e 100644
--- a/lib/HTTPServer.pm
+++ b/lib/HTTPServer.pm
@@ -34,7 +34,7 @@ sub logger {
 
 	if(open(OUT, ">> $main::config{httpd_builtin}->{log_file}")) {
 		if($type eq "OK") {
-			print OUT localtime() . " - $type - [$ENV{REMOTE_ADDR}] \"$ENV{REQUEST_METHOD} $url - $ENV{HTTP_USER_AGENT}\"\n";
+			print OUT localtime() . " - $type - [$ENV{REMOTE_ADDR}] \"$ENV{REQUEST_METHOD} $url - " . ($ENV{HTTP_USER_AGENT} || "") . "\"\n";
 		} elsif($type eq "NOTEXIST") {
 			print OUT localtime() . " - $type - [$ENV{REMOTE_ADDR}] File does not exist: $url\n";
 		} elsif($type eq "AUTHERR") {