diff --git a/Objects/complexobject.c b/Objects/complexobject.c
index c29d48d..4023fa0 100644
--- a/Objects/complexobject.c
+++ b/Objects/complexobject.c
@@ -272,13 +272,19 @@
 static void
 complex_to_buf(char *buf, int bufsz, PyComplexObject *v, int precision)
 {
-	if (v->cval.real == 0.)
-		PyOS_snprintf(buf, bufsz, "%.*gj",
-			      precision, v->cval.imag);
-	else
-		PyOS_snprintf(buf, bufsz, "(%.*g%+.*gj)",
-			      precision, v->cval.real,
-			      precision, v->cval.imag);
+	char format[32];
+	if (v->cval.real == 0.) {
+		PyOS_snprintf(format, 32, "%%.%ig", precision);
+		PyOS_ascii_formatd(buf, bufsz, format, v->cval.imag);
+		strncat(buf, "j", bufsz);
+	} else {
+		char re[64], im[64];
+		
+		PyOS_snprintf(format, 32, "%%.%ig", precision);
+		PyOS_ascii_formatd(re, 64, format, v->cval.real);
+		PyOS_ascii_formatd(im, 64, format, v->cval.imag);
+		PyOS_snprintf(buf, bufsz, "(%s+%sj)", re, im);
+	}
 }
 
 static int
@@ -662,7 +668,6 @@
 static PyObject *
 complex_subtype_from_string(PyTypeObject *type, PyObject *v)
 {
-	extern double strtod(const char *, char **);
 	const char *s, *start;
 	char *end;
 	double x=0.0, y=0.0, z;
@@ -774,7 +779,7 @@
 			}
 			errno = 0;
 			PyFPE_START_PROTECT("strtod", return 0)
-				z = strtod(s, &end) ;
+				z = PyOS_ascii_strtod(s, &end) ;
 			PyFPE_END_PROTECT(z)
 				if (errno != 0) {
 					PyOS_snprintf(buffer, sizeof(buffer),
diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index f1c8e42..bbf56c6 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -132,7 +132,7 @@
 	 * key off errno.
          */
 	PyFPE_START_PROTECT("strtod", return NULL)
-	x = strtod(s, (char **)&end);
+	x = PyOS_ascii_strtod(s, (char **)&end);
 	PyFPE_END_PROTECT(x)
 	errno = 0;
 	/* Believe it or not, Solaris 2.6 can move end *beyond* the null
@@ -164,7 +164,7 @@
 		/* See above -- may have been strtod being anal
 		   about denorms. */
 		PyFPE_START_PROTECT("atof", return NULL)
-		x = atof(s);
+		x = PyOS_ascii_atof(s);
 		PyFPE_END_PROTECT(x)
 		errno = 0;    /* whether atof ever set errno is undefined */
 	}
@@ -223,6 +223,7 @@
 format_float(char *buf, size_t buflen, PyFloatObject *v, int precision)
 {
 	register char *cp;
+	char format[32];
 	/* Subroutine for float_repr and float_print.
 	   We want float numbers to be recognizable as such,
 	   i.e., they should contain a decimal point or an exponent.
@@ -230,7 +231,8 @@
 	   in such cases, we append ".0" to the string. */
 
 	assert(PyFloat_Check(v));
-	PyOS_snprintf(buf, buflen, "%.*g", precision, v->ob_fval);
+	PyOS_snprintf(format, 32, "%%.%ig", precision);
+	PyOS_ascii_formatd(buf, buflen, format, v->ob_fval);
 	cp = buf;
 	if (*cp == '-')
 		cp++;
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index 361d84d..b14dc51 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -3582,7 +3582,7 @@
 	PyOS_snprintf(fmt, sizeof(fmt), "%%%s.%d%c",
 		      (flags&F_ALT) ? "#" : "",
 		      prec, type);
-	PyOS_snprintf(buf, buflen, fmt, x);
+        PyOS_ascii_formatd(buf, buflen, fmt, x);
 	return strlen(buf);
 }