diff --git a/requests_go/tls_client/client.py b/requests_go/tls_client/client.py
index d67a78d..8dca148 100644
--- a/requests_go/tls_client/client.py
+++ b/requests_go/tls_client/client.py
@@ -23,4 +23,4 @@
 request.restype = ctypes.c_char_p
 
 freeMemory = library.freeMemory
-request.argtypes = [ctypes.c_char_p]
+freeMemory.argtypes = [ctypes.c_char_p]