diff --git a/json_object.c b/json_object.c
index 026dab3..192919f 100644
--- a/json_object.c
+++ b/json_object.c
@@ -701,7 +701,9 @@ int64_t json_object_get_int64(const struct json_object *jso)
 	case json_type_int:
 		return jso->o.c_int64;
 	case json_type_double:
-		if (jso->o.c_double >= INT64_MAX)
+		// INT64_MAX can't be exactly represented as a double
+		// so cast to tell the compiler it's ok to round up.
+		if (jso->o.c_double >= (double)INT64_MAX)
 			return INT64_MAX;
 		if (jso->o.c_double <= INT64_MIN)
 			return INT64_MIN;