diff --git a/xwords4/common/comms.c b/xwords4/common/comms.c
index cd39c5cd7..1f020c118 100644
--- a/xwords4/common/comms.c
+++ b/xwords4/common/comms.c
@@ -2327,6 +2327,14 @@ addr_addType( CommsAddrRec* addr, CommsConnType type )
     addr->_conTypes |= 1 << (type - 1);
 }
 
+void
+addr_rmType( CommsAddrRec* addr, CommsConnType type )
+{
+    XP_ASSERT( COMMS_CONN_NONE != type );
+    XP_LOGF( "%s(%s)", __func__, ConnType2Str(type) );
+    addr->_conTypes &= ~(1 << (type - 1));
+}
+
 /* Set of NONE is ok, but for anything else it's illegal to be adding a second
    bit.  Use addr_addType() for that. */
 void
diff --git a/xwords4/common/comms.h b/xwords4/common/comms.h
index e3186bf01..594d0e430 100644
--- a/xwords4/common/comms.h
+++ b/xwords4/common/comms.h
@@ -227,6 +227,7 @@ XP_Bool comms_isConnected( const CommsCtxt* const comms );
 CommsConnType addr_getType( const CommsAddrRec* addr );
 void addr_setType( CommsAddrRec* addr, CommsConnType type );
 void addr_addType( CommsAddrRec* addr, CommsConnType type );
+void addr_rmType( CommsAddrRec* addr, CommsConnType type );
 XP_Bool addr_hasType( const CommsAddrRec* addr, CommsConnType type );
 XP_Bool addr_iter( const CommsAddrRec* addr, CommsConnType* typp, 
                    XP_U32* state );