diff --git a/doc/arm/reference.rst b/doc/arm/reference.rst
index 8a9d954800..be994461c0 100644
--- a/doc/arm/reference.rst
+++ b/doc/arm/reference.rst
@@ -2624,9 +2624,6 @@ options are:
    UDP and TCP queries, but the port applies only to UDP queries. TCP
    queries always use a random unprivileged port.
 
-.. note:: Solaris 2.5.1 and earlier does not support setting the source address
-   for TCP sockets.
-
 .. warning:: Specifying a single port is discouraged, as it removes a layer of
    protection against spoofing errors.
 
@@ -2767,9 +2764,6 @@ options apply to zone transfers.
    ``transfer-source`` statement within the ``view`` or ``zone`` block
    in the configuration file.
 
-   .. note:: Solaris 2.5.1 and earlier does not support setting the source
-      address for TCP sockets.
-
    .. warning:: Specifying a single port is discouraged, as it removes a layer of
       protection against spoofing errors.
 
@@ -2805,9 +2799,6 @@ options apply to zone transfers.
    or per-view basis by including a ``notify-source`` statement within
    the ``zone`` or ``view`` block in the configuration file.
 
-   .. note:: Solaris 2.5.1 and earlier does not support setting the source
-      address for TCP sockets.
-
    .. warning:: Specifying a single port is discouraged, as it removes a layer of
       protection against spoofing errors.
 
@@ -5104,9 +5095,6 @@ The following options apply to DS queries sent to ``parental-agents``:
    ``parental-source`` statement within the ``zone`` or ``view`` block in the
    configuration file.
 
-   .. note:: Solaris 2.5.1 and earlier does not support setting the source
-      address for TCP sockets.
-
    .. warning:: Specifying a single port is discouraged, as it removes a layer of
       protection against spoofing errors.