diff --git a/src/eval.c b/src/eval.c
index 4537562..db6ef9d 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -23455,7 +23455,8 @@
 	else
 	    arg = fudi.fd_newkey;
 	if (arg != NULL && (fudi.fd_di == NULL
-				     || fudi.fd_di->di_tv.v_type != VAR_FUNC))
+				     || (fudi.fd_di->di_tv.v_type != VAR_FUNC
+				 && fudi.fd_di->di_tv.v_type != VAR_PARTIAL)))
 	{
 	    if (*arg == K_SPECIAL)
 		j = 3;