diff --git a/bindings/python/unicorn/unicorn.py b/bindings/python/unicorn/unicorn.py
index e0f9a364..8a5b9926 100644
--- a/bindings/python/unicorn/unicorn.py
+++ b/bindings/python/unicorn/unicorn.py
@@ -89,8 +89,8 @@ _setup_prototype(_uc, "uc_open", ucerr, ctypes.c_uint, ctypes.c_uint, ctypes.POI
 _setup_prototype(_uc, "uc_close", ucerr, uc_engine)
 _setup_prototype(_uc, "uc_strerror", ctypes.c_char_p, ucerr)
 _setup_prototype(_uc, "uc_errno", ucerr, uc_engine)
-_setup_prototype(_uc, "uc_reg_read", ucerr, uc_engine, ctypes.c_uint64, ctypes.c_void_p)
-_setup_prototype(_uc, "uc_reg_write", ucerr, uc_engine, ctypes.c_uint64, ctypes.c_void_p)
+_setup_prototype(_uc, "uc_reg_read", ucerr, uc_engine, ctypes.c_uint, ctypes.c_void_p)
+_setup_prototype(_uc, "uc_reg_write", ucerr, uc_engine, ctypes.c_uint, ctypes.c_void_p)
 _setup_prototype(_uc, "uc_mem_read", ucerr, uc_engine, ctypes.c_uint64, ctypes.POINTER(ctypes.c_char), ctypes.c_size_t)
 _setup_prototype(_uc, "uc_mem_write", ucerr, uc_engine, ctypes.c_uint64, ctypes.POINTER(ctypes.c_char), ctypes.c_size_t)
 _setup_prototype(_uc, "uc_emu_start", ucerr, uc_engine, ctypes.c_uint64, ctypes.c_uint64, ctypes.c_uint64, ctypes.c_size_t)