diff --git a/extmod/machine_mem.c b/extmod/machine_mem.c
index a1494bd51..73e2f7fd1 100644
--- a/extmod/machine_mem.c
+++ b/extmod/machine_mem.c
@@ -40,7 +40,7 @@
 
 #if !defined(MICROPY_MACHINE_MEM_GET_READ_ADDR) || !defined(MICROPY_MACHINE_MEM_GET_WRITE_ADDR)
 STATIC uintptr_t machine_mem_get_addr(mp_obj_t addr_o, uint align) {
-    uintptr_t addr = mp_obj_int_get_truncated(addr_o);
+    uintptr_t addr = mp_obj_get_int_truncated(addr_o);
     if ((addr & (align - 1)) != 0) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("address %08x is not aligned to %d bytes"), addr, align);
     }
diff --git a/ports/unix/modmachine.c b/ports/unix/modmachine.c
index a6eb8c01e..5b462a3b1 100644
--- a/ports/unix/modmachine.c
+++ b/ports/unix/modmachine.c
@@ -47,7 +47,7 @@
 #if MICROPY_PY_MACHINE
 
 uintptr_t mod_machine_mem_get_addr(mp_obj_t addr_o, uint align) {
-    uintptr_t addr = mp_obj_int_get_truncated(addr_o);
+    uintptr_t addr = mp_obj_get_int_truncated(addr_o);
     if ((addr & (align - 1)) != 0) {
         mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("address %08x is not aligned to %d bytes"), addr, align);
     }
diff --git a/tests/extmod/machine1.py b/tests/extmod/machine1.py
index 6ff38cc05..0c7f8122f 100644
--- a/tests/extmod/machine1.py
+++ b/tests/extmod/machine1.py
@@ -26,3 +26,23 @@ try:
     del machine.mem8[0]
 except TypeError:
     print("TypeError")
+
+try:
+    machine.mem8[0:1]
+except TypeError:
+    print("TypeError")
+
+try:
+    machine.mem8[0:1] = 10
+except TypeError:
+    print("TypeError")
+
+try:
+    machine.mem8["hello"]
+except TypeError:
+    print("TypeError")
+
+try:
+    machine.mem8["hello"] = 10
+except TypeError:
+    print("TypeError")
diff --git a/tests/extmod/machine1.py.exp b/tests/extmod/machine1.py.exp
index bb421ea5c..250485969 100644
--- a/tests/extmod/machine1.py.exp
+++ b/tests/extmod/machine1.py.exp
@@ -2,3 +2,7 @@
 ValueError
 ValueError
 TypeError
+TypeError
+TypeError
+TypeError
+TypeError