@@ -468,11 +468,12 @@
 
 - (OFData *)messagePackRepresentation
 {
 	void *pool = objc_autoreleasePoolPush();
 	int64_t seconds = (int64_t)_seconds;
-	uint32_t nanoseconds = (_seconds - trunc(_seconds)) * 1000000000;
+	uint32_t nanoseconds =
+	    (uint32_t)((_seconds - trunc(_seconds)) * 1000000000);
 	OFData *ret;
 
 	if (seconds >= 0 && seconds < 0x400000000) {
 		if (seconds <= UINT32_MAX && nanoseconds == 0) {
 			uint32_t seconds32 = (uint32_t)seconds;