diff --git a/src/libbson/NEWS b/src/libbson/NEWS
index 44d764747c..696077f29f 100644
--- a/src/libbson/NEWS
+++ b/src/libbson/NEWS
@@ -1,7 +1,9 @@
 libbson 1.25.2 (Unreleased)
 ===========================
 
-TODO: Add news.
+Fixes:
+
+  * Fix conversion warning with GCC 12.
 
 libbson 1.25.1
 ==============
diff --git a/src/libbson/src/bson/bson-iter.h b/src/libbson/src/bson/bson-iter.h
index ef7ef59fb3..22af2e45d2 100644
--- a/src/libbson/src/bson/bson-iter.h
+++ b/src/libbson/src/bson/bson-iter.h
@@ -440,10 +440,11 @@ bson_iter_timeval_unsafe (const bson_iter_t *iter, struct timeval *tv)
    int64_t value = bson_iter_int64_unsafe (iter);
 #ifdef BSON_OS_WIN32
    tv->tv_sec = (long) (value / 1000);
+   tv->tv_usec = (long) (value % 1000) * 1000;
 #else
-   tv->tv_sec = (suseconds_t) (value / 1000);
+   tv->tv_sec = (time_t) (value / 1000);
+   tv->tv_usec = (suseconds_t) (value % 1000) * 1000;
 #endif
-   tv->tv_usec = (value % 1000) * 1000;
 }