diff --git a/.gitignore b/.gitignore
index d75edea..9bccae6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 venv
-__pycache__
\ No newline at end of file
+__pycache__
+.mypy_cache
\ No newline at end of file
diff --git a/riscemu/priv/PrivCPU.py b/riscemu/priv/PrivCPU.py
index ef34bf0..867ab38 100644
--- a/riscemu/priv/PrivCPU.py
+++ b/riscemu/priv/PrivCPU.py
@@ -134,7 +134,7 @@ class PrivCPU(CPU):
             self._time_interrupt_enabled = True
 
         @self.csr.callback('mtimecmph')
-        def mtimecmp(old, new):
+        def mtimecmph(old, new):
             self._time_timecmp = (new << 32) + self.csr.get('mtimecmp')
             self._time_interrupt_enabled = True