diff --git a/libexec/rbootd/rmpproto.c b/libexec/rbootd/rmpproto.c
index aa4be5647222..a132588101f2 100644
--- a/libexec/rbootd/rmpproto.c
+++ b/libexec/rbootd/rmpproto.c
@@ -330,7 +330,8 @@ SendBootRepl(struct rmp_packet *req, RMPCONN *rconn, char *filelist[])
 	 *  stripped file name and spoof the client into thinking that it
 	 *  really got what it wanted.
 	 */
-	filename = (filename = strrchr(filepath,'/'))? ++filename: filepath;
+	filename = strrchr(filepath,'/');
+	filename = filename? filename + 1: filepath;
 
 	/*
 	 *  Check that this is a valid boot file name.