diff --git a/protocols/inspircd.py b/protocols/inspircd.py
index 3eefe72..be76c2d 100644
--- a/protocols/inspircd.py
+++ b/protocols/inspircd.py
@@ -673,14 +673,6 @@ class InspIRCdProtocol(TS6BaseProtocol):
     # SVSTOPIC is used by InspIRCd module m_topiclock - its arguments are the same as FTOPIC
     handle_svstopic = handle_ftopic
 
-    def handle_invite(self, numeric, command, args):
-        """Handles incoming INVITEs."""
-        # <- :70MAAAAAC INVITE 0ALAAAAAA #blah 0
-        target = args[0]
-        channel = self.toLower(args[1])
-        # We don't actually need to process this; just send the hook so plugins can use it
-        return {'target': target, 'channel': channel}
-
     def handle_knock(self, numeric, command, args):
         """Handles channel KNOCKs."""
         # <- :70MAAAAAA ENCAP * KNOCK #blah :abcdefg
diff --git a/protocols/ircs2s_common.py b/protocols/ircs2s_common.py
index 00ed56f..8146c67 100644
--- a/protocols/ircs2s_common.py
+++ b/protocols/ircs2s_common.py
@@ -234,6 +234,27 @@ class IRCS2SProtocol(IRCCommonProtocol):
             self.users[numeric].away = text = ''
         return {'text': text}
 
+    def handle_invite(self, numeric, command, args):
+        """Handles incoming INVITEs."""
+        # TS6:
+        #  <- :70MAAAAAC INVITE 0ALAAAAAA #blah 12345
+        # P10:
+        #  <- ABAAA I PyLink-devel #services 1460948992
+        #  Note that the target is a nickname, not a numeric.
+
+        target = self._get_UID(args[0])
+        channel = self.toLower(args[1])
+
+        curtime = int(time.time())
+        try:
+            ts = int(args[2])
+        except IndexError:
+            ts = curtime
+
+        ts = ts or curtime  # Treat 0 timestamps (e.g. inspircd) as the current time.
+
+        return {'target': target, 'channel': channel, 'ts': ts}
+
     def handle_kill(self, source, command, args):
         """Handles incoming KILLs."""
         killed = args[0]
diff --git a/protocols/p10.py b/protocols/p10.py
index fa590bb..82d1095 100644
--- a/protocols/p10.py
+++ b/protocols/p10.py
@@ -1171,18 +1171,6 @@ class P10Protocol(IRCS2SProtocol):
         return {'channel': channel, 'setter': args[1], 'text': topic,
                 'oldtopic': oldtopic}
 
-    def handle_invite(self, source, command, args):
-        """Handles incoming INVITEs."""
-        # From P10 docs:
-        # 1 <target nick>
-        # 2 <channel>
-        # - note that the target is a nickname, not a numeric.
-        # <- ABAAA I PyLink-devel #services 1460948992
-        target = self._get_UID(args[0])
-        channel = self.toLower(args[1])
-
-        return {'target': target, 'channel': channel}
-
     def handle_clearmode(self, numeric, command, args):
         """Handles CLEARMODE, which is used to clear a channel's modes."""
         # <- ABAAA CM #test ovpsmikbl
diff --git a/protocols/ts6.py b/protocols/ts6.py
index 4002221..73466b7 100644
--- a/protocols/ts6.py
+++ b/protocols/ts6.py
@@ -632,18 +632,6 @@ class TS6Protocol(TS6BaseProtocol):
         self.channels[channel].topicset = True
         return {'channel': channel, 'setter': setter, 'ts': ts, 'text': topic}
 
-    def handle_invite(self, numeric, command, args):
-        """Handles incoming INVITEs."""
-        # <- :70MAAAAAC INVITE 0ALAAAAAA #blah 12345
-        target = args[0]
-        channel = self.toLower(args[1])
-        try:
-            ts = args[2]
-        except IndexError:
-            ts = int(time.time())
-        # We don't actually need to process this; it's just something plugins/hooks can use
-        return {'target': target, 'channel': channel, 'ts': ts}
-
     def handle_chghost(self, numeric, command, args):
         """Handles incoming CHGHOST commands."""
         target = self._get_UID(args[0])
diff --git a/protocols/unreal.py b/protocols/unreal.py
index 2e63e0a..bcbc1aa 100644
--- a/protocols/unreal.py
+++ b/protocols/unreal.py
@@ -934,14 +934,6 @@ class UnrealProtocol(TS6BaseProtocol):
         self.users[target].realname = newgecos = args[1]
         return {'target': target, 'newgecos': newgecos}
 
-    def handle_invite(self, numeric, command, args):
-        """Handles incoming INVITEs."""
-        # <- :GL INVITE PyLink-devel :#a
-        target = self._get_UID(args[0])
-        channel = self.toLower(args[1])
-        # We don't actually need to process this; it's just something plugins/hooks can use
-        return {'target': target, 'channel': channel}
-
     def handle_kill(self, numeric, command, args):
         """Handles incoming KILLs."""
         # <- :GL| KILL GLolol :hidden-1C620195!GL| (test)