diff --git a/libc/stdio/dtoa.c b/libc/stdio/dtoa.c
index f0c7ee86e..7e4ba24a0 100644
--- a/libc/stdio/dtoa.c
+++ b/libc/stdio/dtoa.c
@@ -379,7 +379,7 @@ int __fmt_dtoa(int (*out)(const char *, void *, size_t), void *arg, int d,
       if (prec < 0) prec = 0;
       if (!longdouble) {
         x = va_arg(va, double);
-        s = s0 = dtoa(x, prec ? 2 : 0, prec + 1, &decpt, &fpb.sign, &se);
+        s = s0 = dtoa(x, 2, prec + 1, &decpt, &fpb.sign, &se);
         if (decpt == 9999) {
           if (s && s[0] == 'N') {
             fpb.kind = STRTOG_NaN;