diff --git a/src/zugbruecke/core/session_client.py b/src/zugbruecke/core/session_client.py
index 8e3d3995..9d32650e 100644
--- a/src/zugbruecke/core/session_client.py
+++ b/src/zugbruecke/core/session_client.py
@@ -168,7 +168,7 @@ def load_library(self, dll_name, dll_type, dll_param = {}):
 		return self.dll_dict[dll_name]
 
 
-	def path_unix_to_wine(in_path):
+	def path_unix_to_wine(self, in_path):
 
 		# If in stage 1, fire up stage 2
 		if self.stage == 1:
@@ -178,7 +178,7 @@ def path_unix_to_wine(in_path):
 		return self.client.path_unix_to_wine(in_path)
 
 
-	def path_wine_to_unix(in_path):
+	def path_wine_to_unix(self, in_path):
 
 		# If in stage 1, fire up stage 2
 		if self.stage == 1: