diff --git a/Objects/stringlib/formatter.h b/Objects/stringlib/formatter.h
index 2e3e5a6..86235a6 100644
--- a/Objects/stringlib/formatter.h
+++ b/Objects/stringlib/formatter.h
@@ -789,7 +789,7 @@
 
     if (precision < 0)
         precision = 6;
-    if (type == 'f' && (fabs(x) / 1e25) >= 1e25)
+    if (type == 'f' && fabs(x) >= 1e50)
         type = 'g';
 
     /* cast "type", because if we're in unicode we need to pass a
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index 8f82f4f..3b5d331 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -4344,7 +4344,7 @@
 	}
 	if (prec < 0)
 		prec = 6;
-	if (type == 'f' && fabs(x)/1e25 >= 1e25)
+	if (type == 'f' && fabs(x) >= 1e50)
 		type = 'g';
 	/* Worst case length calc to ensure no buffer overrun:
 
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 107ed29..4ce9bed 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -8286,7 +8286,7 @@
         return -1;
     if (prec < 0)
         prec = 6;
-    if (type == 'f' && (fabs(x) / 1e25) >= 1e25)
+    if (type == 'f' && fabs(x) >= 1e50)
         type = 'g';
     /* Worst case length calc to ensure no buffer overrun: