diff --git a/process.c b/process.c
index 6f3fc23..14b5d5b 100644
--- a/process.c
+++ b/process.c
@@ -1998,7 +1998,7 @@ rb_exec_getargs(int *argc_p, VALUE **argv_p, int accept_shell, VALUE *env_ret, V
         }
     }
 
-    if (0 < *argc_p) {
+    if (0 < *argc_p && !RB_TYPE_P((*argv_p)[0]), T_ARRAY) {
         hash = rb_check_hash_type((*argv_p)[0]);
         if (!NIL_P(hash)) {
             *env_ret = hash;