diff --git a/Source/WebGPU/WGSL/Metal/MetalFunctionWriter.cpp b/Source/WebGPU/WGSL/Metal/MetalFunctionWriter.cpp
index 4482dbfa845c..2e4f2cb28abd 100644
--- a/Source/WebGPU/WGSL/Metal/MetalFunctionWriter.cpp
+++ b/Source/WebGPU/WGSL/Metal/MetalFunctionWriter.cpp
@@ -508,6 +508,7 @@ void FunctionDefinitionWriter::visit(AST::UnaryExpression& unary)
 
 void FunctionDefinitionWriter::visit(AST::BinaryExpression& binary)
 {
+    m_stringBuilder.append("(");
     visit(binary.leftExpression());
     switch (binary.operation()) {
     case AST::BinaryOperation::Add:
@@ -567,6 +568,7 @@ void FunctionDefinitionWriter::visit(AST::BinaryExpression& binary)
         break;
     }
     visit(binary.rightExpression());
+    m_stringBuilder.append(")");
 }
 
 void FunctionDefinitionWriter::visit(AST::PointerDereferenceExpression& pointerDereference)
diff --git a/Tools/TestWebKitAPI/Tests/WGSL/MetalGenerationTests.cpp b/Tools/TestWebKitAPI/Tests/WGSL/MetalGenerationTests.cpp
index 0e5cb6bd4c7a..f3c74b36e4a2 100644
--- a/Tools/TestWebKitAPI/Tests/WGSL/MetalGenerationTests.cpp
+++ b/Tools/TestWebKitAPI/Tests/WGSL/MetalGenerationTests.cpp
@@ -83,7 +83,7 @@ using namespace metal;
 [[fragment]] void function0(unsigned parameter0 [[sample_mask]], unsigned parameter1 [[sample_id]], vec<float, 4> parameter2 [[position]])
 {
     vec<float, 4> local0 = parameter2;
-    unsigned local1 = parameter1 + parameter0;
+    unsigned local1 = (parameter1 + parameter0);
 }
 
 )"_s);