diff --git a/backends/vulkan/runtime/vk_api/Pipeline.cpp b/backends/vulkan/runtime/vk_api/Pipeline.cpp
index 0c66a085ad9..51b59ed4d1f 100644
--- a/backends/vulkan/runtime/vk_api/Pipeline.cpp
+++ b/backends/vulkan/runtime/vk_api/Pipeline.cpp
@@ -174,6 +174,14 @@ void SpecVarList::append(const SpecVarList& other) {
   vars.insert(vars.end(), other.vars.begin(), other.vars.end());
 }
 
+void SpecVarList::reserve(const size_t size) {
+  vars.reserve(size);
+}
+
+void SpecVarList::append(const SpecVar& other) {
+  vars.push_back(other);
+}
+
 std::vector<VkSpecializationMapEntry> SpecVarList::generate_map_entries()
     const {
   std::vector<VkSpecializationMapEntry> map_entries;
diff --git a/backends/vulkan/runtime/vk_api/Pipeline.h b/backends/vulkan/runtime/vk_api/Pipeline.h
index 5460a0acba7..b9f4e3d2a35 100644
--- a/backends/vulkan/runtime/vk_api/Pipeline.h
+++ b/backends/vulkan/runtime/vk_api/Pipeline.h
@@ -82,6 +82,10 @@ class SpecVarList final {
 
   void append(const SpecVarList& other);
 
+  void reserve(const size_t size);
+
+  void append(const SpecVar& other);
+
   std::vector<VkSpecializationMapEntry> generate_map_entries() const;
 
   friend bool operator==(const SpecVarList& lhs, const SpecVarList& rhs);