diff --git a/Objects/longobject.c b/Objects/longobject.c
index 899c9405bf7..5b7a00aa9fc 100644
--- a/Objects/longobject.c
+++ b/Objects/longobject.c
@@ -883,10 +883,10 @@ long_format(PyObject *aa, int base, int addL)
 			accumbits += SHIFT;
 			assert(accumbits >= basebits);
 			do {
-				char digit = (char)(accum & (base - 1));
-				digit += (digit < 10) ? '0' : 'A'-10;
+				char cdigit = (char)(accum & (base - 1));
+				cdigit += (cdigit < 10) ? '0' : 'A'-10;
 				assert(p > PyString_AS_STRING(str));
-				*--p = digit;
+				*--p = cdigit;
 				accumbits -= basebits;
 				accum >>= basebits;
 			} while (i < size_a-1 ? accumbits >= basebits :