diff --git a/waflib/Build.py b/waflib/Build.py
index 0f7a201b..13340aac 100644
--- a/waflib/Build.py
+++ b/waflib/Build.py
@@ -428,9 +428,9 @@ class BuildContext(Context.Context):
 			node = self.path.find_resource(path)
 
 		if isinstance(value, list):
-			self.deps_man[id(node)].extend(value)
+			self.deps_man[node].extend(value)
 		else:
-			self.deps_man[id(node)].append(value)
+			self.deps_man[node].append(value)
 
 	def launch_node(self):
 		"""Returns the launch directory as a :py:class:`waflib.Node.Node` object"""
diff --git a/waflib/Task.py b/waflib/Task.py
index 75e4aade..2e90e258 100644
--- a/waflib/Task.py
+++ b/waflib/Task.py
@@ -663,7 +663,7 @@ class Task(TaskBase):
 			additional_deps = bld.deps_man
 			for x in self.inputs + self.outputs:
 				try:
-					d = additional_deps[id(x)]
+					d = additional_deps[x]
 				except KeyError:
 					continue