1 files changed, 1 insertions, 1 deletions
diff --git a/py/formatfloat.c b/py/formatfloat.c
index b16746b39..ea5a07977 100644
--- a/py/formatfloat.c
+++ b/py/formatfloat.c
@@ -332,7 +332,7 @@ int mp_format_float(FPTYPE f, char *buf, size_t buf_size, char fmt, int prec, ch
 
     // Print the digits of the mantissa
     for (int i = 0; i < num_digits; ++i, --dec) {
-        int32_t d = f;
+        int32_t d = (int32_t)f;
         *s++ = '0' + d;
         if (dec == 0 && prec > 0) {
             *s++ = '.';