diff --git a/src/nvim/eval/funcs.c b/src/nvim/eval/funcs.c
index c411362018..0934864040 100644
--- a/src/nvim/eval/funcs.c
+++ b/src/nvim/eval/funcs.c
@@ -1293,7 +1293,7 @@ static void f_expand(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
   rettv->v_type = VAR_STRING;
   if (argvars[1].v_type != VAR_UNKNOWN
       && argvars[2].v_type != VAR_UNKNOWN
-      && tv_get_number_chk(&argvars[2], &error)
+      && tv_get_bool_chk(&argvars[2], &error)
       && !error) {
     tv_list_set_ret(rettv, NULL);
   }
@@ -1324,7 +1324,7 @@ static void f_expand(typval_T *argvars, typval_T *rettv, EvalFuncData fptr)
     // When the optional second argument is non-zero, don't remove matches
     // for 'wildignore' and don't put matches for 'suffixes' at the end.
     if (argvars[1].v_type != VAR_UNKNOWN
-        && tv_get_number_chk(&argvars[1], &error)) {
+        && tv_get_bool_chk(&argvars[1], &error)) {
       options |= WILD_KEEP_ALL;
     }
     if (!error) {