diff --git a/simplejson/_speedups.c b/simplejson/_speedups.c
index 57ae20fdf8f921b0e8172c0665ed71fbf14cd86c_c2ltcGxlanNvbi9fc3BlZWR1cHMuYw==..e7f4b3a3d0b8dd420d2b1b6cdc2666bc3f2c3f64_c2ltcGxlanNvbi9fc3BlZWR1cHMuYw== 100644
--- a/simplejson/_speedups.c
+++ b/simplejson/_speedups.c
@@ -2639,7 +2639,7 @@
         static const unsigned int long_long_bitsize = SIZEOF_LONG_LONG * 8;
         int int_as_string_bitcount_val = PyLong_AsLong(int_as_string_bitcount);
         if (int_as_string_bitcount_val > 0 && int_as_string_bitcount_val < long_long_bitsize) {
-            s->max_long_size = PyLong_FromUnsignedLongLong(1LLU << int_as_string_bitcount_val);
+            s->max_long_size = PyLong_FromUnsignedLongLong(1ULL << int_as_string_bitcount_val);
             s->min_long_size = PyLong_FromLongLong(-1LL << int_as_string_bitcount_val);
             if (s->min_long_size == NULL || s->max_long_size == NULL) {
                 return -1;