diff --git a/src/writer/spirv/builder.cc b/src/writer/spirv/builder.cc
index 408ea4b2eb..1bdb0adb9c 100644
--- a/src/writer/spirv/builder.cc
+++ b/src/writer/spirv/builder.cc
@@ -615,6 +615,8 @@ uint32_t Builder::GenerateBinaryExpression(ast::BinaryExpression* expr) {
     }
   } else if (expr->IsNotEqual()) {
     op = lhs_is_float_or_vec ? spv::Op::OpFOrdNotEqual : spv::Op::OpINotEqual;
+  } else if (expr->IsOr()) {
+    op = spv::Op::OpBitwiseOr;
   } else {
     return 0;
   }
diff --git a/src/writer/spirv/builder_binary_expression_test.cc b/src/writer/spirv/builder_binary_expression_test.cc
index 8da3eb8c49..2ee5a0e938 100644
--- a/src/writer/spirv/builder_binary_expression_test.cc
+++ b/src/writer/spirv/builder_binary_expression_test.cc
@@ -122,7 +122,8 @@ INSTANTIATE_TEST_SUITE_P(
     BuilderTest,
     BinaryArithIntegerTest,
     testing::Values(BinaryData{ast::BinaryOp::kAdd, "OpIAdd"},
-                    BinaryData{ast::BinaryOp::kAnd, "OpBitwiseAnd"}));
+                    BinaryData{ast::BinaryOp::kAnd, "OpBitwiseAnd"},
+                    BinaryData{ast::BinaryOp::kOr, "OpBitwiseOr"}));
 
 using BinaryArithFloatTest = testing::TestWithParam<BinaryData>;
 TEST_P(BinaryArithFloatTest, Scalar) {