diff --git a/MobileGL/MG_State/GLState/ProgramState/ShaderObject.cpp b/MobileGL/MG_State/GLState/ProgramState/ShaderObject.cpp
index d90f40e9..646ec7c7 100644
--- a/MobileGL/MG_State/GLState/ProgramState/ShaderObject.cpp
+++ b/MobileGL/MG_State/GLState/ProgramState/ShaderObject.cpp
@@ -67,7 +67,12 @@ namespace MobileGL {
                 root->traverse(&traverser);
                 auto& symbols = traverser.GetCollectedSymbols();
                 for (const auto& symbol : symbols) {
-                    m_uniforms[symbol->getName().c_str()] = symbol->getQualifier().layoutLocation;
+                    auto layoutLoc = symbol->getQualifier().layoutLocation;
+                    if (layoutLoc >= m_uniforms.size()) {
+                        m_uniforms.reserve(std::bit_ceil(layoutLoc));
+                        m_uniforms.resize(layoutLoc + 1);
+                    }
+                    m_uniforms[layoutLoc] = symbol->getName().c_str();
                 }
 
                 return true;
diff --git a/MobileGL/MG_State/GLState/ProgramState/ShaderObject.h b/MobileGL/MG_State/GLState/ProgramState/ShaderObject.h
index 60a0285d..70a598b5 100644
--- a/MobileGL/MG_State/GLState/ProgramState/ShaderObject.h
+++ b/MobileGL/MG_State/GLState/ProgramState/ShaderObject.h
@@ -73,7 +73,7 @@ namespace MobileGL {
                 const ShaderStage m_stage;
                 String m_source;
                 SharedPtr<glslang::TShader> m_shader;
-                UnorderedMap<String, Int> m_uniforms;
+                Vector<String> m_uniforms;
 
                 String m_infoLog;
                 Bool m_deleteStatus = false;
diff --git a/MobileGL/MG_Test/Program/ProgramUtilTest.cpp b/MobileGL/MG_Test/Program/ProgramUtilTest.cpp
index 58f650fb..6701e5f7 100644
--- a/MobileGL/MG_Test/Program/ProgramUtilTest.cpp
+++ b/MobileGL/MG_Test/Program/ProgramUtilTest.cpp
@@ -199,7 +199,7 @@ TEST_F(ProgramUtilTest, CompileVertexShaderWithLocation) {
         ASSERT_NE(res.error().errc, 0);
         FAIL() << "errc: " << res.error().errc << "\nlog: " << res.error().log;
     }
-    UnorderedMap<String, Int> uniforms;
+    Vector<String> uniforms;
 
     auto pShader = res.value();
     auto root = pShader->getIntermediate()->getTreeRoot();
@@ -207,12 +207,17 @@ TEST_F(ProgramUtilTest, CompileVertexShaderWithLocation) {
     root->traverse(&traverser);
     auto& symbols = traverser.GetCollectedSymbols();
     for (const auto& symbol : symbols) {
-        uniforms[symbol->getName().c_str()] = symbol->getQualifier().layoutLocation;
+        auto layoutLoc = symbol->getQualifier().layoutLocation;
+        if (layoutLoc >= uniforms.size()) {
+            uniforms.reserve(std::bit_ceil(layoutLoc));
+            uniforms.resize(layoutLoc + 1);
+        }
+        uniforms[layoutLoc] = symbol->getName().c_str();
     }
 
-    EXPECT_EQ(uniforms["ProjMat"], 1);
-    EXPECT_EQ(uniforms["InSize"], 20);
-    EXPECT_EQ(uniforms["OutSize"], 4095);
+    EXPECT_EQ(uniforms[1], "ProjMat");
+    EXPECT_EQ(uniforms[20], "InSize");
+    EXPECT_EQ(uniforms[4095], "OutSize");
 }
 
 TEST_F(ProgramUtilTest, CompileAndLinkProgram) {