diff --git a/files/www/cgi-bin/signal b/files/www/cgi-bin/signal
index a7eaa6da..6cb6b4f3 100755
--- a/files/www/cgi-bin/signal
+++ b/files/www/cgi-bin/signal
@@ -94,7 +94,7 @@ $header = <<EOF;
            labelAngle: -45,
         },
         axisY: {
-          title: "dB",
+          title: "dBm",
           interlacedColor: "#F0F8FF",
         },
         data: [