diff --git a/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/HAProxy.xml b/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/HAProxy.xml
index a5be01a92..33d431a46 100644
--- a/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/HAProxy.xml
+++ b/net/haproxy/src/opnsense/mvc/app/models/OPNsense/HAProxy/HAProxy.xml
@@ -336,7 +336,7 @@
                 </enabled>
                 <name type="TextField">
                     <Required>Y</Required>
-                    <mask>/^([0-9a-zA-Z._]){1,255}$/u</mask>
+                    <mask>/^([0-9a-zA-Z._\-]){1,255}$/u</mask>
                     <ValidationMessage>Should be a string between 1 and 255 characters.</ValidationMessage>
                 </name>
                 <description type="TextField">
@@ -697,7 +697,7 @@
                 </enabled>
                 <name type="TextField">
                     <Required>Y</Required>
-                    <mask>/^([0-9a-zA-Z._]){1,255}$/u</mask>
+                    <mask>/^([0-9a-zA-Z._\-]){1,255}$/u</mask>
                     <ValidationMessage>Should be a string between 1 and 255 characters.</ValidationMessage>
                 </name>
                 <description type="TextField">
@@ -1013,7 +1013,7 @@
                     <Required>Y</Required>
                 </enabled>
                 <name type="TextField">
-                    <mask>/^([0-9a-zA-Z._]){1,255}$/u</mask>
+                    <mask>/^([0-9a-zA-Z._\-]){1,255}$/u</mask>
                     <ValidationMessage>Should be a string between 1 and 255 characters.</ValidationMessage>
                     <Required>Y</Required>
                 </name>