diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index 31c3d5dd..bec63ecf 100644
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c
@@ -356,9 +356,9 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
 				*d = *d + i;
 				while (*d > 999999999) {
 					*d--=0;
+					if (d<a) *--a=0;
 					(*d)++;
 				}
-				if (d<a) a=d;
 				for (i=10, e=9*(r-a); *a>=i; i*=10, e++);
 			}
 		}