diff --git a/broqer/op/combine_latest.py b/broqer/op/combine_latest.py
index cbff705..a1c871a 100644
--- a/broqer/op/combine_latest.py
+++ b/broqer/op/combine_latest.py
@@ -109,13 +109,13 @@ def emit(self, value: Any, who: Publisher) -> None:
         # remember state of this source
         self._partial_state[index] = value
 
-        # if emits from publishers are missing or source of this emit
-        # is not one of emit_on -> don't evaluate and notify subscribers
+        # if emit_partial is False and emits from publishers are missing 
+        # or source of this emit is not one of emit_on -> don't evaluate 
+        # and notify subscribers
 
-        if not self._emit_partial and (self._missing or
-                                       (self._emit_on is not None and all(
-                                           who is not p for p in self._emit_on
-                                           ))):
+        if (self._emit_on is not None and 
+                all(who is not p for p in self._emit_on)) or \
+                (not self._emit_partial and self._missing):
             return None
 
         # evaluate