diff --git a/php/msgpack_unpack.c b/php/msgpack_unpack.c
index bcc235f3..a6c3c297 100644
--- a/php/msgpack_unpack.c
+++ b/php/msgpack_unpack.c
@@ -487,7 +487,7 @@ int msgpack_unserialize_array(
 
     array_init(*obj);
 
-    unpack->stack[unpack->deps++] = count;
+    if (count) unpack->stack[unpack->deps++] = count;
 
     return 0;
 }
@@ -507,7 +507,7 @@ int msgpack_unserialize_map(
 {
     MSGPACK_UNSERIALIZE_ALLOC_VALUE(unpack);
 
-    unpack->stack[unpack->deps++] = count;
+    if (count) unpack->stack[unpack->deps++] = count;
 
     unpack->type = MSGPACK_SERIALIZE_TYPE_NONE;