diff --git a/docs/Changes b/docs/Changes
index 5e08d5f6a..bbfcbed17 100644
--- a/docs/Changes
+++ b/docs/Changes
@@ -7,6 +7,7 @@ A Ability for users with registrations pending to drop their registrations with
 A Added support for Plexus 3
 A Readded in support for /cs op/deop/etc to op/deop you in all channels
 F Changed the GHOST command to not allow ghosting unidentified users if the RECOVER command exists
+F Some failed logic in /operserv exception that prevents proper exceptions from being added
 
 Anope Version 1.9.3
 --------------------
diff --git a/modules/core/os_session.cpp b/modules/core/os_session.cpp
index bde023aaa..8b2cb53af 100644
--- a/modules/core/os_session.cpp
+++ b/modules/core/os_session.cpp
@@ -256,7 +256,7 @@ class CommandOSException : public Command
 		}
 		else
 		{
-			if (mask.find('!') == Anope::string::npos || mask.find('@') == Anope::string::npos)
+			if (mask.find('!') != Anope::string::npos || mask.find('@') != Anope::string::npos)
 			{
 				source.Reply(OPER_EXCEPTION_INVALID_HOSTMASK);
 				return MOD_CONT;