diff --git a/classes.py b/classes.py
index c2a8c9f..eddbdeb 100644
--- a/classes.py
+++ b/classes.py
@@ -1148,6 +1148,7 @@ class PyLinkNetworkCoreWithUtils(PyLinkNetworkCore):
         # If the query is a string, we have to parse it first.
         if origstring:
             modes = self.parse_modes(target, modes.split(" "))
+
         # Get the current mode list first.
         if self.is_channel(target):
             c = oldobj or self._channels[target]
@@ -1210,6 +1211,11 @@ class PyLinkNetworkCoreWithUtils(PyLinkNetworkCore):
                 log.debug("(%s) reverse_modes: skipping reversing '%s %s' with %s since it "
                           "wasn't previously set.", self.name, char, arg, mpair)
                 continue
+            elif char[0] == '-' and mchar not in oldmodes_mapping:
+                # Check the same for regular modes that previously didn't exist
+                log.debug("(%s) reverse_modes: skipping reversing '%s %s' with %s since it "
+                          "wasn't previously set.", self.name, char, arg, mpair)
+                continue
             newmodes.append(mpair)
 
         log.debug('(%s) reverse_modes: new modes: %s', self.name, newmodes)