From 9e88585917a0721bb3ad8aa37847a5288ad0b14e Mon Sep 17 00:00:00 2001
From: James Hilton-Balfe <gobot1234yt@gmail.com>
Date: Fri, 22 Apr 2022 10:46:47 +0100
Subject: [PATCH] Update src/betterproto/__init__.py

Co-authored-by: Arun Babu Neelicattu <arun.neelicattu@gmail.com>
---
 src/betterproto/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/betterproto/__init__.py b/src/betterproto/__init__.py
index caed82f8f..2faa12236 100644
--- a/src/betterproto/__init__.py
+++ b/src/betterproto/__init__.py
@@ -467,7 +467,7 @@ def _dump_float(value: float) -> Union[float, str]:
         return INFINITY
     if value == -float("inf"):
         return NEG_INFINITY
-    if math.isnan(value):
+    if isinstance(value, float) and math.isnan(value):
         return NAN
     return value