diff --git a/src/servers/registrar/TRoster.cpp b/src/servers/registrar/TRoster.cpp
index 7ad49f15d2..232eb0bebe 100644
--- a/src/servers/registrar/TRoster.cpp
+++ b/src/servers/registrar/TRoster.cpp
@@ -376,7 +376,7 @@ TRoster::HandleIsAppRegistered(BMessage *request)
 
 	// check the parameters
 	// entry_ref
-	if (error == B_OK & !BEntry(&ref).Exists())
+	if (error == B_OK && !BEntry(&ref).Exists())
 		SET_ERROR(error, B_ENTRY_NOT_FOUND);
 	// team/token
 	if (error == B_OK && team < 0 && token == 0)