diff --git a/Modules/_ctypes/_ctypes.c b/Modules/_ctypes/_ctypes.c
index a93290e..7452202 100644
--- a/Modules/_ctypes/_ctypes.c
+++ b/Modules/_ctypes/_ctypes.c
@@ -4202,7 +4202,7 @@
             i += self->b_length;
         return Array_item(_self, i);
     }
-    else if PySlice_Check(item) {
+    else if (PySlice_Check(item)) {
         StgDictObject *stgdict, *itemdict;
         PyObject *proto;
         PyObject *np;
diff --git a/Modules/_testbuffer.c b/Modules/_testbuffer.c
index a4e1643..0c6ef16 100644
--- a/Modules/_testbuffer.c
+++ b/Modules/_testbuffer.c
@@ -1815,7 +1815,7 @@
         if (init_slice(base, key, 0) < 0)
             goto err_occurred;
     }
-    else if PyTuple_Check(key) {
+    else if (PyTuple_Check(key)) {
         /* multi-dimensional slice */
         PyObject *tuple = key;
         Py_ssize_t i, n;