diff --git a/can/parser_pyx.pyx b/can/parser_pyx.pyx
index 724b5e4875..084ef9af77 100644
--- a/can/parser_pyx.pyx
+++ b/can/parser_pyx.pyx
@@ -74,8 +74,8 @@ cdef class CANParser:
     # [nanos, [[address, 0, data, src], ...]]
     # [[nanos, [[address, 0, data, src], ...], ...]]
 
-    for v in self.vl_all.values():
-      for l in v.values():  # no-cython-lint
+    for v in self.vl_all.itervalues():
+      for l in v.itervalues():  # no-cython-lint
         l.clear()
 
     cdef vector[SignalValue] new_vals