diff --git a/milkymist/timer/__init__.py b/milkymist/timer/__init__.py
index 17c7d0ed9..32bfb55ad 100644
--- a/milkymist/timer/__init__.py
+++ b/milkymist/timer/__init__.py
@@ -10,7 +10,7 @@ class Timer(Module, AutoCSR):
 		self._reload = CSRStorage(width)
 		
 		self.submodules.ev = EventManager()
-		self.ev.zero = EventSourceLevel()
+		self.ev.zero = EventSourceProcess()
 		self.ev.finalize()
 
 		###
diff --git a/milkymist/uart/__init__.py b/milkymist/uart/__init__.py
index 6cf2dad26..2fcb19d5f 100644
--- a/milkymist/uart/__init__.py
+++ b/milkymist/uart/__init__.py
@@ -10,7 +10,7 @@ class UART(Module, AutoCSR):
 		self._divisor = CSRStorage(16, reset=int(clk_freq/baud/16))
 		
 		self.submodules.ev = EventManager()
-		self.ev.tx = EventSourceLevel()
+		self.ev.tx = EventSourceProcess()
 		self.ev.rx = EventSourcePulse()
 		self.ev.finalize()